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UNCITRAL Digest of Article 6 case law

See also:      UNCITRAL Digest cases plus added cases
Above plus annotations and added material

The UNCITRAL Digest of case law on the United
Nations Convention on the International Sale of Goods
[*]

A/CN.9/SER.C/DIGEST/CISG/6 [8 June 2004]
Reproduced with the permission of UNCITRAL

[Text of Article 6
Digest of Article 6 case law
-    Introduction
-    Derogation
-    Express exclusion
-    Implicit exclusion
-    Opting-in]

ARTICLE 6

     The parties may exclude the application of this Convention or, subject to article 12, derogate from or vary the effect of any of its provisions.

DIGEST OF ARTICLE 6 CASE LAW

Introduction

1. According to article 6 of the Convention, the parties may exclude the Convention’s application (totally or partially) or derogate from its provisions. Therefore, even if the Convention is otherwise applicable, one must nevertheless determine whether the parties have excluded it or derogated from its provisions in order to conclude that the Convention applies in a particular case.[1] According to various courts, the possibility of opting-out is subject to a clear intent of the parties.[2]

2. By allowing the parties to exclude the Convention and derogate from its provisions, the drafters affirmed the principle according to which the primary source of the rules governing international sales contracts is party autonomy.[3] In doing so, the drafters clearly acknowledged the Convention’s non-mandatory nature [4] and the central role that party autonomy plays in international commerce and, in particular, in international sales.[5]

Derogation

3. Article 6 makes a distinction between the exclusion of the application of the Convention and the derogation from some of its provisions. Whereas the former does not encounter any limitations, the latter does. Where one of the parties to the contract for the international sale of goods has its place of business in a State that has made a reservation under article 96,[6] the parties may not derogate from or vary the effect of article 12. In those cases, any provision "that allows a contract of sale or its modification or termination by agreement or any offer, acceptance or other indication of intention to be made in any form other than in writing does not apply" (art. 12). All other provisions may be derogated from.[7]

4. Although the Convention does not expressly mention it, there are other provisions that the parties cannot derogate from, more specifically, the public international law provisions (i.e. arts. 89-101). This is due to the fact that those provisions address issues relevant to contracting States rather than private parties. It should be noted that this issue has not yet been addressed by case law.

Express exclusion

5. The applicability of the Convention can be expressly excluded by the parties. In respect of this kind of exclusion, two lines of cases have to be distinguished: the exclusion with and the exclusion without any indication by the parties of the law applicable to their contract. In those cases in which the Convention’s application is excluded with an indication of the applicable law, which in some countries can be made in the course of the legal proceedings,[8] the law applicable will be that applicable by virtue of the rules of private international law of the forum,[9] which in most countries makes applicable the law chosen by the parties.[10] Where the Convention is expressly excluded without an indication of the applicable law, the applicable law is to be identified by means of the private international law rules of the forum.

Implicit exclusion

6. A number of courts have considered the question of whether application of the Convention can be implicitly excluded. According to many courts,[11] the lack of an express reference in the Convention to the possibility of implicitly excluding its application does not preclude it. This view is supported by a reference in the Official Records, which shows that the majority of delegations were opposed to the proposal advanced during the diplomatic conference according to which a total or partial exclusion of the Convention could only be made "expressly".[12] The express reference in the Convention to the possibility of an implicit exclusion merely "has been eliminated lest the special reference to ‘implied’ exclusion might encourage courts to conclude, on insufficient grounds, that the Convention had been wholly excluded".[13] According to few court decisions [14] and an arbitral award,[15] however, the Convention cannot be excluded implicitly, on the grounds that the Convention does not expressly provide for that possibility.

7. A variety of ways of implicitly excluding the Convention have been suggested. One possibility is for the parties to choose the law [16] of a Non-contracting State as the law applicable to their contract.[17]

8. The choice of the law of a Contracting State as the law governing the contract poses more difficult problems. It has been suggested in an arbitral award [18] and several court decisions [19] that the choice of the law of a Contracting State ought to amount to an implicit exclusion of the Convention’s application, since otherwise the choice of the parties would have no practical meaning. Most court decisions [20] and arbitral awards,[21] however, take a different view. The grounds for that view may be summarized as follows: on the one hand, the Convention is part of the law of the  Contracting State chosen by the parties and, on the other, the choice of the law of the  Contracting State functions to identify the law by which the gaps in the Convention must be filled.[22] According to this line of decisions, the choice of the law of a  Contracting State, if made without particular reference to the domestic law of that State, does not appear to exclude the Convention’s applicability. Of course, where the parties clearly chose the domestic law of a Contracting State to apply, the Convention must be considered as having been excluded.[23]

9. The choice of a forum may also lead to the implicit exclusion of the Convention’s applicability. In those cases, however, where the forum chosen is located in a contracting State and there is evidence that the parties wanted to apply the law of the forum, two arbitral tribunals have applied the Convention.[24]

10. The question has arisen of whether the Convention’s application is also excluded where the parties argue a case on the sole basis of a domestic law despite the fact that all of the Convention’s criteria of applicability are met. In those countries where the judge must always apply the correct law even if the parties based their arguments on a law that does not apply in the case (jura novit curia), the mere fact that the parties argued on the sole basis of a domestic law did not in itself lead to the exclusion of the Convention.[25] One court found that if the parties are not aware of the Convention’s applicability and argue on the basis of a domestic law merely because they believe that this law is applicable, the judges will nevertheless have to apply the Convention.[26] In one country which does not recognize the principle of jura novit curia, a court applied domestic law when the parties argued their case by reference to  domestic sales law.[27] This approach has also been adopted by a court [28] as well as an arbitral tribunal [29] sitting in countries that acknowledge the principle jura novit curia.

11. According to one court decision, the inclusion of Incoterms by the parties does not constitute an implicit exclusion of the Convention.[30]

Opting-in

12. While the Convention expressly provides the parties with the possibility of excluding its application either in whole or in part, it does not address the issue of whether the parties may make the Convention applicable when it would not otherwise apply. This issue was expressly dealt with by the 1964 Hague Convention relating to a Uniform Law on the Formation of Contracts for the International Sale of Goods, which contained a provision, article 4, that expressly provided the parties with the possibility of "opting in". The fact that the Convention does not contain a provision comparable to that article does not necessarily mean that the parties are not allowed to "opt in". This view is also supported by the fact that a proposal made by the former German Democratic Republic during the diplomatic conference [31] that the Convention should apply even where the preconditions for its application are not met, as long as the parties wanted it to be applicable. This proposal was rejected.  It was noted during the discussions that the proposed text was unnecessary in that the principle of party autonomy was sufficient to allow the parties to "opt in" to the Convention.


FOOTNOTES

* The present text was prepared using the full text of the decisions cited in the Case Law on UNCITRAL Texts (CLOUT) abstracts and other citations listed in the footnotes. The abstracts are intended to serve only as summaries of the underlying decisions and may not reflect all the points made in the digest. Readers are advised to consult the full texts of the listed court and arbitral decisions rather than relying solely on the CLOUT abstracts.

[Citations to cisgw3 case presentations have been substituted [in brackets] for the case citations provided in the UNCITRAL Digest. This substitution has been made to facilitate online access to CLOUT abstracts, original texts of court and arbitral decisions, and full text English translations of these texts (available in most but not all cases). For citations UNCITRAL had used, go to <http://www.uncitral.org/english/clout/digest_cisg_e.htm>.]

1. See CLOUT case No. 378 [ITALY Tribunale [District Court] Vigevano 12 July 2000, available online at <http://cisgw3.law.pace.edu/cases/000712i3.html>]; CLOUT case No. 338 [GERMANY Oberlandesgericht [Appellate Court] Hamm  23 June 1998, available online at <http://cisgw3.law.pace.edu/cases/980623g1.html>]; CLOUT case No. 223 [FRANCE Cour d’appel [Appellate Court] Paris 15 October 1997, available online at <http://cisgw3.law.pace.edu/cases/971015f1.html>] (see full text of the decision); CLOUT case No. 230 [GERMANY Oberlandesgericht [Appellate Court] Karlsruhe 25 June 1997, available online at <http://cisgw3.law.pace.edu/cases/970625g1.html>] (see full text of the decision); CLOUT case No. 190 [AUSTRIA Oberster Gerichtshof [Supreme Court] 11 February 1997, available online at <http://cisgw3.law.pace.edu/cases/970211a3.html>] (see full text of the decision); CLOUT case No. 311 [GERMANY Oberlandesgericht [Appellate Court] Köln 8 January 1997, available online at <http://cisgw3.law.pace.edu/cases/970108g1.html>] (see full text of the decision); CLOUT case No. 211 [SWITZERLAND Tribunal Cantonal [Appellate Court] Vaud 11 March 1996, available online at <http://cisgw3.law.pace.edu/cases/960311s1.html>] (see full text of the decision); CLOUT case No. 170 [GERMANY Landgericht [District Court] Trier 12 October 1995, available online at <http://cisgw3.law.pace.edu/cases/951012g1.html>] (see full text of the decision); CLOUT case No. 106 [AUSTRIA Oberster Gerichtshof [Supreme Court] 10 November 1994, available online at <http://cisgw3.law.pace.edu/cases/941110a3.html>] (see full text of the decision); CLOUT case No. 199 [SWITZERLAND Tribunal Cantonal [Appellate Court] Valais 29 June 1994, available online at <http://cisgw3.law.pace.edu/cases/940629s1.html>] (see full text of the decision); CLOUT case No. 317 [GERMANY Oberlandesgericht [Appellate Court] Karlsruhe 20 November 1992, available online at <http://cisgw3.law.pace.edu/cases/921120g1.html>] (see full text of the decision).

2. [UNITED STATES Asante Technologies, Inc. v. PMC-Sierra, Inc. U.S. District Court [California] 27 July 2001, available online at <http://cisgw3.law.pace.edu/cases/010727u1.html>]; [BELGIUM Tribunal de Commerce [District Court] Namur 15 January 2002, available online at <http://cisgw3.law.pace.edu/cases/020115b1.html>].

3. For a reference to this principle, see CLOUT case No. 229 [GERMANY Bundesgerichtshof [Federal Supreme Court] 4 December 1996, available online at <http://cisgw3.law.pace.edu/cases/961204g1.html>] (see full text of the decision).

4. For an express reference to the Convention’s non-mandatory nature, see [ITALY Suprema Corte di Cassazione [Supreme Court] 19 June 2000, available online at <http://cisgw3.law.pace.edu/cases/000619i3.html>]; [AUSTRIA Oberster Gerichtshof [Supreme Court] 21 March 2000, available online at <http://cisgw3.law.pace.edu/cases/000321a3.html>]; CLOUT case No. 240 [AUSTRIA Oberster Gerichtshof [Supreme Court] 15 October 1998, available online at <http://cisgw3.law.pace.edu/cases/981015a3.html>] (see full text of the decision); Handelsgericht Wien, 4 March 1997, unpublished; [SWITZERLAND Valais [Appellate Court] 29 June 1994, available online at <http://cisgw3.law.pace.edu/cases/940629s1.html>].

5. [GERMANY Landgericht [District Court] Stendal 12 October 2000, available online at <http://cisgw3.law.pace.edu/cases/001012g1.html>].

6. See article 96: "A Contracting State whose legislation requires contracts of sale to be concluded in or evidenced by writing may at any time make a declaration in accordance with article 12 that any provision of article 11, article 29, or Part II of this Convention, that allows a contract of sale or its modification or termination by agreement or any offer, acceptance, or other indication of intention to be made in any form other than in writing, does not apply where any party has his place of business in that State."

7. For example, a court has stated that article 55, relating to open-price contracts, is only applicable where the parties have not agreed to the contrary (CLOUT case No. 151 [FRANCE Cour d’appel [Appellate Court] Grenoble 26 April 1995, available online at <http://cisgw3.law.pace.edu/cases/950426f1.html>]), while another court observed that article 39, relating to the notice requirement, is not mandatory and can be derogated from [GERMANY Landgericht [District Court] Gießen 5 July 1994, available online at <http://cisgw3.law.pace.edu/cases/940705g1.html>]. Similarly, the Austrian Supreme Court has concluded that article 57 also can be derogated from (CLOUT case No. 106 [AUSTRIA Oberster Gerichtshof 10 November 1994, available online at <http://cisgw3.law.pace.edu/cases/941110a3.html>]).

8. This is true for instance in Germany, as pointed out in case law; see, for example, CLOUT case No. 122 [GERMANY Oberlandesgericht [Appellate Court] Köln 26 August 1994, available online at <http://cisgw3.law.pace.edu/cases/940826g1.html>]; CLOUT case No. 292 [GERMANY Oberlandesgericht [Appellate Court] Saarbrücken 13 January 1993, available online at <http://cisgw3.law.pace.edu/cases/930113g1.html>] (see full text of the decision); this is also true in Switzerland, see [SWITZERLAND Handelsgericht [Commercial Court] Zürich 10 February 1999, available online at <http://cisgw3.law.pace.edu/cases/990210s1.html>].

9. See CLOUT case No. 231 [GERMANY Bundesgerichtshof [Supreme Court] 23 July 1997, available online at <http://cisgw3.law.pace.edu/cases/970723g1.html>] (see full text of the decision) ; [GERMANY Oberlandesgericht [Appellate Court] Frankfurt 15 March 1996, available online at <http://cisgw3.law.pace.edu/cases/960315g1.html>].

10. Where the rules of private international law of the forum are those laid down either in the 1955 Hague Convention on the Law Applicable to International Sales of Goods Convention, 510 U.N.T.S. 149, in the 1980 Rome Convention on the Law Applicable to Contractual Obligations (United Nations, Treaty Series, vol. 1605, No. 28023), or in the 1994 Inter-American Convention on the Law Applicable to Contractual Obligations (Organization of American States Fifth Inter-American Specialized Conference on Private International Law: Inter-American Convention on the Law Applicable to International Contracts, March 17, 1994, OEA/Ser.K/XXI.5, CIDIP-V/doc.34/94 rev. 3 corr. 2, March 17, 1994, available on the Internet at <http://www.oas.org/juridico/english/Treaties/b-56.html>), the law chosen by the parties will govern.

11. [AUSTRIA Oberster Gerichtshof [Supreme Court] 22 October 2001, available online at <http://cisgw3.law.pace.edu/cases/011022a3.html>]; [FRANCE Cour de Cassation [Supreme Court] 26 June 2001, available online at <http://cisgw3.law.pace.edu/cases/010626f1.html>]; CLOUT case No. 378 [ITALY Tribunale [District Court] Vigevano 12 July 2000, available online at <http://cisgw3.law.pace.edu/cases/000712i3.html>]; [GERMANY Oberlandesgericht [Appellate Court] Desden 27 December 1999, available online at <http://cisgw3.law.pace.edu/cases/991227g1.html>]; CLOUT case No. 273 [GERMANY Oberlandesgericht [Appellate Court] München 9 July 1997, available online at <http://cisgw3.law.pace.edu/cases/970709g1.html>] (see full text of the decision); [GERMANY Landgericht [District Court] München 29 May 1995, available online at <http://cisgw3.law.pace.edu/cases950529g1/.html>]; CLOUT case No. 136 [GERMANY Oberlandesgericht [Appellate Court] Celle 24 May 1995, available online at <http://cisgw3.law.pace.edu/cases/950524g1.html>] (see full text of the decision).

12. Official Records of the United Nations Conference on Contracts for the International Sale of Goods, Vienna, 10 March-11 April 1980 (United Nations publication, Sales No. E.81.IV.3), 85-86.

13.  Ibid., 17.

14. [GERMANY Landgericht [District Court] Landshut 5 April 1995, available online at <http://cisgw3.law.pace.edu/cases/950405g1.html>]; [UNITED STATES Orbisphere Corp. v. United States [Federal] Court of International Trade 24 October 1989, available on the Internet at: <http://cisgw3.law.pace.edu/cases/891024u1.html>].

15. See Tribunal of International Commercial Arbitration at the Russian Federation Chamber of Commerce and Industry, award No. 54/1999, referred to on the Internet at <http://cisgw3.law.pace.edu/cases/000124r1.html>.

16. Whether such a choice is to be acknowledged at all depends on the rules of private international law of the forum.

17. See CLOUT case No. 49 [GERMANY Oberlandesgericht [Appellate Court] Düsseldorf 2 July 1993, available online at <http://cisgw3.law.pace.edu/cases/930702g1.html>] (see full text of the decision).

18. See CLOUT case No. 92 [ITALY Arbitration - Ad hoc tribunal Florence 19 April 1994, available online at <http://cisgw3.law.pace.edu/cases/940419i3.html>].

19. [FRANCE Cour d’Appel [Appellate Court] Colmar 26 September 1995, available online at <http://cisgw3.law.pace.edu/cases/950926f1.html>]; CLOUT case No. 326 [SWITZERLAND Kantonsgericht [District Court] Zug 16 March 1995, available online at <http://cisgw3.law.pace.edu/cases/950316s1.html>]; CLOUT case No. 54 [ITALY Tribunale [District Court] Monza 14 January 1993, available online at <http://cisgw3.law.pace.edu/cases/930114i3.html>].

20. [BELGIUM Hof van Beroep [Appellate Court] Gent 12 Month 2000, available online at <http://cisgw3.law.pace.edu/cases/020515b1.html>]; [GERMANY Oberlandesgericht [Appellate Court] Frankfurt 30 August 2000, available online at <http://cisgw3.law.pace.edu/cases/000830g1.html>]; CLOUT case No. 270 [GERMANY Bundesgerichtshof [Supreme Court] 25 November 1998, available online at <http://cisgw3.law.pace.edu/cases/981125g1.html>]; CLOUT case No. 297 [GERMANY Oberlandesgericht [Appellate Court] München 21 January 1998, available online at <http://cisgw3.law.pace.edu/cases/980121g1.html>] (see full text of the decision); CLOUT case No. 220 [SWITZERLAND Kantonsgericht [District Court] Nidwalden 3 December 1997, available online at <http://cisgw3.law.pace.edu/cases/971203s1.html>]; CLOUT case No. 236 [GERMANY Bundesgerichtshof [Supreme Court] 23 July 1997, available online at <http://cisgw3.law.pace.edu/cases/970723g2.html>]; CLOUT case No. 287 [GERMANY Oberlandesgericht [Appellate Court] München 9 July 1997, available online at <http://cisgw3.law.pace.edu/cases/970709g1.html>]; CLOUT case No. 230 [GERMANY Oberlandesgericht [Appellate Court] Karlsruhe 25 June 1997, available online at <http://cisgw3.law.pace.edu/cases/970625g1.html>] (see full text of the decision); CLOUT case No. 214 [SWITZERLAND Handelsgericht [Commercial Court] Zürich 5 February 1997, available online at <http://cisgw3.law.pace.edu/cases/970205s1.html>] (see full text of the decision); CLOUT case No. 206 [FRANCE Cour de Cassation [Supreme Court] 17 December 1996, available online at <http://cisgw3.law.pace.edu/cases/961217f1.html>] (see full text of the decision); [GERMANY Landgericht [District Court] Kassel 15 February 1996, available online at <http://cisgw3.law.pace.edu/cases/960215g1.html>]; CLOUT case No. 125 [GERMANY Oberlandesgericht [Appellate Court] Hamm 9 June 1995, available online at <http://cisgw3.law.pace.edu/cases/950609g1.html>]; [NETHERLANDS Arrondissementsrechtbank [District Court] s'Gravenhage 7 June 1995, available online at <http://cisgw3.law.pace.edu/cases/950607n1.html>]; CLOUT case No. 167 [GERMANY Oberlandesgericht [Appellate Court] München 8 February 1995, available online at <http://cisgw3.law.pace.edu/cases/950208g1.html>] (see full text of the decision); CLOUT case No. 120 [GERMANY Oberlandesgericht [Appellate Court] Köln 22 February 1994, available online at <http://cisgw3.law.pace.edu/cases/940222g1.html>]; CLOUT case No. 281 [GERMANY Oberlandesgericht [Appellate Court] Koblenz 17 September 1993, available online at <http://cisgw3.law.pace.edu/cases/930917g1.html>]; CLOUT case No. 48 [GERMANY Oberlandesgericht [Appellate Court] Düsseldorf 8 January 1993, available online at <http://cisgw3.law.pace.edu/cases/930108g1.html>].

21. [ICC Court of Arbitration, case No. 9187 of [June 1999], available online at <http://cisgw3.law.pace.edu/cases/999187i1.html>; CLOUT case No. 166 [GERMANY Hamburg Arbitration Award of 21 March / 21 June 1996, available online at <http://cisgw3.law.pace.edu/cases/960621g1.html>]; [HUNGARY Budapest Arbitration Award case No. Vb 94124 of 17 November 1995, available online at <http://cisgw3.law.pace.edu/cases/951117h1.html>]; [ICC Court of Arbitration, case No. 8324 of 1995, available online at <http://cisgw3.law.pace.edu/cases/958324i1.html>]; [ICC Court of Arbitration, case No. 7844 of 1994, available online at <http://cisgw3.law.pace.edu/cases/947844i1.html>]; [ICC Court of Arbitration, case No. 7660 of 23 August 1994, available online at <http://cisgw3.law.pace.edu/cases/947660i1.html>]; [ICC Court of Arbitration, case No. 7565 of 1994, available online at <http://cisgw3.law.pace.edu/cases/947565i1.html>]; CLOUT case No. 103 [ICC Court of Arbitration, case No. 6653 of 26 March 1993, available online at <http://cisgw3.law.pace.edu/cases/936653i1.html>]; CLOUT case No. 93 [AUSTRIA Vienna Arbitration Award case No. SCH-4336 of 15 June 1994, available online at <http://cisgw3.law.pace.edu/cases/940615a3.html>].

22. [UNITED STATES BP Oil International v. Empresa Estatal Petroleos de Ecuador, Federal Appellate Court [5th Circuit] 11 June 2003, available online at <http://cisgw3.law.pace.edu/cases/991207u1.html>].

23. [GERMANY Oberlandesgericht [Appellate Court] Frankfurt 30 August 2000, available online at <http://cisgw3.law.pace.edu/cases/000830g1.html>]; [GERMANY Oberlandesgericht [Appellate Court] Frankfurt 15 March 1996, available online at <http://cisgw3.law.pace.edu/cases/960315g1.html>].

24. [GERMANY Arbitration Award [Arbitral Tribunal] Hamburg 29 December 1998, available online at <http://cisgw3.law.pace.edu/cases/981229g1.html>]; CLOUT case No. 166 [GERMANY Hamburg Arbitration Award of 21 March / 21 June 1996, available online at <http://cisgw3.law.pace.edu/cases/960621g1.html>]; (see full text of the decision).

25. See CLOUT case No. 378 [ITALY Tribunale [District Court] Vigevano 12 July 2000, available online at <http://cisgw3.law.pace.edu/cases/000712i3.html>]; CLOUT case No. 125 [GERMANY Oberlandesgericht [Appellate Court] Hamm 9 June 1995, available online at <http://cisgw3.law.pace.edu/cases/950609g1.html>]; [GERMANY Landgericht [District Court] Landshut 5 April 1995, available online at <http://cisgw3.law.pace.edu/cases/950405g1.html>].

26. See CLOUT case No. 136 [GERMANY Oberlandesgericht [Appellate Court] Celle 24 May 1995, available online at <http://cisgw3.law.pace.edu/cases/950524g1.html>] (see full text of the decision).

27. [UNITED STATES GPL Treatment Ltd. v. Louisiana-Pacific Group [Appellate Court] Oregon 12 April 1995, available online at <http://cisgw3.law.pace.edu/cases/950412u1.html>].

28. [FRANCE Cour de Cassation [Supreme Court] 26 June 2001, available on the Internet at <http://cisgw3.law.pace.edu/cases/010626f1.html>].

29. [ICC Court of Arbitration case No. 8453 of October 1995, available online at <http://cisgw3.law.pace.edu/cases/958453i1.html>].

30. [AUSTRIA Oberster Gerichtshof [Supreme Court] 22 October 2001, available online at <http://cisgw3.law.pace.edu/cases/011022a3.html>].

31. See Official Records of the United Nations Conference on Contracts for the International Sale of Goods, Vienna, 10 March-11 April 1980 (United Nations publication, Sales No. E.81.IV.3), 86, 252-253.


CASE ANNOTATED COMPARATIVES
-  UNIDROIT Principles
-  PECL comparative

Remarks on the Manner in which the UNIDROIT Principles May Be Used to Interpret or Supplement Article 6 of the CISG

Bojidara Borisova [*]
December 2004

  1. Introduction
  2. CISG's dispositive character
  3. Manner in which party autonomy might be exercised
  4. Scope of party autonomy
  5. Party autonomy limitations

I. Introduction

The principle of party autonomy entrenched in CISG Art. 6 represents an important guarantee for the effective functioning of international trade and accommodates the fulfillment of the principle of freedom of contract, which is a basic tenet of international commercial relations.[1] The inclusion of this principle in the provisions of the CISG reflects the strong conviction of the international community that specific warranties must be created for the establishment of a freely operating, market-oriented international economy within the framework of which the contracting parties have the freedom to act in conformity with their business interests. Similar provisions were also incorporated in other international uniform laws adopted prior to the CISG.[2]

The UNIDROIT Principles, which were promulgated almost fifteen years after the adoption of the CISG, contain two articles that correspond in substance with CISG Art. 6. UNIDROIT Principles arts 1.1 and 1.5, though similar in essence to CISG Art. 6, better illustrate the concept of party autonomy and can be used for the interpretation and application of CISG Art. 6.[3] This concept was regulated in two other important conventions on international commercial relations -- one adopted the same year as the CISG and the other a few years later.[4] The solid interest that the international community showed in the importance of party autonomy once again underlines its significance. Although today it seems unthinkable to have a uniform act that regulates international commercial relations that does not explicitly emphasize party autonomy, there was a strong opposition against the inclusion of this concept during the draft process of the Convention.[5]

When discussing the provisions of CISG Art. 6, one must take into consideration the following basic problems.

II. CISG's dispositive character

Although the principle of freedom of contract is generally recognized as one of the basic principles that ensures establishment and application of fair and competitive international economic rules, it might not be automatically enforced. Hence, as far as the prescriptions of one particular international act are concerned, an explicit text providing the possibility for the contracting parties to choose the applicable law and thus to define the exact terms of their contract must be included.[6] An additional requirement that makes the principle of party autonomy workable is the character of the Convention's prescriptions. If the Convention contains mandatory rules, i.e., rules from which the parties may not derogate, party autonomy cannot be applied and the contracting parties must define the exact terms of their contract in conformity with the corresponding provisions of the Convention.

This is for the most part not the case with the CISG and the UNIDROIT Principles. Both international instruments are of primarily non-mandatory character and this is unambiguously stated both in scholarly writing [7] and in the Official Comments on the UNIDROIT Principles.

III. Manner in which party autonomy might be exercised

Both CISG Art. 6 and its counterpart UNIDROIT Principles arts. 1.1 and 1.5 do not explicitly stipulate the manner in which the contracting parties may define the law applicable to their contractual relations. This was a long debated issue during the drafting period of the CISG, which attempts to balance the concept of party autonomy with the need for protection of the weaker party to the contract.[8]

Because of the unclear wording of CISG Art. 6, a controversy exists whether the application of the CISG might be explicitly or impliedly excluded. In general, there are two contrary opinions.

According to one school of thought, the CISG as a uniform set of rules allows only express exclusion.[9] The first argument of the proponents of this opinion is that only express exclusion can guarantee the uniform application of the CISG and, consequently, can ensure the success of the Convention.

The second argument in favor of express exclusion is derived from the provision of CISG under Art. 7, which includes the interpretation and gap-filling mechanism that the Convention must apply, providing that both operations must be fulfilled in conformity with the general principles underlying the Convention. One of the general principles of the international trade practice that CISG has been said to proclaim is the principle of fairness, to protect the weaker party from the dominant's party behavior and thus to guarantee the equality of both contracting parties.[10] There are authors who support only the express exclusion for purely pragmatic reasons.[11] According to them, requiring only express exclusion of the Convention will give more certainty to the contracting parties and will overcome the scholarly discrepancies.

Over the years of the CISG's application, it appears that the opinion stating that Art. 6 provides also for the implied opting-out of the Convention has received increasing support not only in commentary [12] but also in the case law.[13] This option is clearly stated also in the Official Comments as regards the interpretation and application of the UNIDROIT Principles.

Two basic arguments in favor of implied exclusion of the CISG can be stated.[14] The first is derived from the strict interpretation of the prescription of CISG Art. 6 and is based on the inference that if the drafters of the Convention wanted to allow only the express exclusion they would have formulated the text of this article differently, including in it an indisputable indication about the manner in which the exemption and the choice of law must be made. In view of the fact that such specification was not made, it is argued that implied exclusion is possible.

In this respect, it might be arguable that the Official Comments to the UNIDROIT Principles contributes to the deduction of the assertion that CISG Art. 6 provides the possibility that not only an express but also an implied exclusion of the Convention to be achieved by the contracting parties. Consequently, since CISG Art. 6 and its counterpart UNIDROIT Principles Arts. 1.1 and 1.5 do not stipulate the exact manner for the opting-out of the uniform law, both methods are possible.

The second argument in favor of implied exclusion is based on the currently existing practice of the international trade, which also confirms the possibility to exclude the application of the uniform law expressly or impliedly.[15]

When discussing party autonomy, the next important question that needs to be clarified is how to determine whether there is or is not an implied exclusion. In this respect, the UNIDROIT Principles Official Comment on Art. 1.5. provides certain indications in what circumstances would be considered to cause one to conclude that the contracting parties have impliedly excluded the application of the uniform law.

The first and probably most obvious occasion, which can also be applicable to the exclusion of the CISG, is when the contracting parties have negotiated contract terms that are totally inconsistent with the regulations of the uniform law. Thus the contracting parties, with one action, managed to achieve the exclusion of the Convention and also to determine the applicable law. The Official Comments to the UNIDROIT Principles do not differentiate between contract terms that are individually negotiated or form part of standard terms.[16]

In scholarly writings, it is unanimously accepted that the choice of the law of a non-Contracting State constitutes an implied exclusion.[17] Such definite conclusion cannot be made when the contracting parties had chosen the law of a Contracting State without explicitly referring to the domestic law of that State.[18] When a State adopts the CISG, the Convention becomes part of its law and only direct indication that the contracting parties have chosen the domestic rules of a Contracting State may lead to the conclusion that an implied opting-out of the Convention is made.

Finally, some authors[19] support the opinion that the choice of a forum or of an arbitral tribunal can be regarded as an implied exclusion if two requirements are met. The first condition is to deduce from the contracting parties' choice their intention to subject the contractual relation to the domestic law of the State where the forum or the arbitral tribunal is located. The second requirement is that the forum or the arbitral tribunal be located in a non-Contracting State. Both conditions concurrently are said to amount to an implied exclusion of the CISG.

IV. Scope of party autonomy

The basic objective of party autonomy is not the exclusion of the Uniform Law but the exercise of the freedom of the contracting parties to choose the law applicable to their contractual relationship. In this connection, what is important to be discussed is the extent of the contracting parties' freedom of choice.

Both CISG Art. 6 and its counterpart UNIDROIT Principles art. 1.5 indicate in similar manner the scope of the party autonomy. Both generally stipulate that contracting parties may exclude the application of the Uniform law in whole or they may choose to derogate only from the effect of any of its provisions.[20] Such inference can be easily drawn from the interpretation of CISG Art. 6 and is confirmed also in the Official Comments to the UNIDROIT Principles and in scholarly writings.[21]

With respect to this, several questions must be discussed. What must be considered first is the effect of the full or partial exclusion of the Convention when the contracting parties have chosen the applicable law. Secondly, both hypotheses must be discussed in the context of lack of designation of applicable law.

When contracting parties opt-out of the Convention entirely when choosing the applicable law, it must be noted once again that if the choice refers to the law of a Contracting State it is best to specifically state that the domestic law of that State is chosen. In cases of total exclusion without indication of the applicable law, both legal scholars and international case practice unanimously state that the rules of private international law should determine the applicable law.[22]

Basically, that also applies in the same manner when the contracting parties derogate only part of the CISG's provisions. With respect to the scope of a partial derogation of the CISG's articles, the following question arises: Is it necessary to apply the General provisions of the Convention (Part I, Chapter II) along with the prescriptions of the law chosen by the contracting parties or the law determined by the rules of the private international law, i.e., can we use the approach stated in the Official Comments on UNIDROIT Principles art. 1.5? [23] The answer of this question is negative and requires that the different nature of the two set of rules - CISG and UNIDROIT Principles - be taken into consideration. The former is part of the substantive law regulating the international sale of goods and is automatically applicable if the conditions of CISG Art. 1(1) are fulfilled, while the later requires the parties' consent.[24]

On the other hand, the Final Provisions of the CISG also regulate some general questions concerning the ratification and acceptance process of the Convention, its entrance into force and its denouncement,[25] the rights of the Contracting States to make reservations[26] and some other technical issues regarding the application of the Convention[27]. The opinion that the contracting parties cannot modify these provisions of the CISG, being a Contracting States' obligations under public international law, is more or less unanimously accepted. However, some authors accept the possibility that the contracting parties in their contract may modify even the effect of the CISG Final Provisions.[28]

V. Party autonomy limitations

Party autonomy is not unlimited. Both CISG Art. 6 and its counterpart UNIDROIT Principles art. 1.5 impose certain restrictions on the contracting parties freedom of choice.

In the case of partial exclusion of the Convention, the contracting parties may not derogate the application of two groups of prescriptions. Firstly, these are the mandatory provisions of the CISG itself and secondly these are the mandatory provisions of the law that should regulate the contractual relation in case when the party autonomy concept was not applied.[29] CISG Art. 6 indicates only one prescription of the Convention that has mandatory character and therefore the contracting parties may not derogate from its application - CISG Article 12.[30] The mandatory prescriptions in the second hypothesis should be determined in each separate case.

The limitation of CISG Art. 12 does not apply in the case of total exclusion of the Convention.[31] In that case the contracting parties should act only in conformity with the mandatory provisions of the domestic law that normally would regulate the contractual relation.[32]

Finally, it must be mentioned that some scholars express the opinion that except for CISG Art. 12 there are also other mandatory provisions of the Convention that impose a limitation on the contracting parties freedom of choice under the provision of CISG Art. 6.[33] To this effect the UNIDROIT Principles Official Comment provides little assistance towards the clarification of this problem, because it uses a more general and definition type approach. Still the issue is very controversial and must be carefully approached by the contracting parties.


FOOTNOTES

* Bojidara Borisova received her law degree from Sofia University St.Kl.Ohridsky, Bulgaria, in 2001. Currently, she is a Ph.D. candidate at the same university, working on her research project on international investment law. Since July 2003 she is working as a part time legal advisor at the InvestBulgaria Agency.

1. See the Official Comments on Art. 1.1 of the UNIDROIT Principles, available online at <http://cisgw3.law.pace.edu/cisg/principles/uni6.html#official>.

2. See the Uniform Law on the International Sale of Goods and the Uniform Law on the Formation of Contracts for the International Sale of Goods. For detailed historical analysis of the party autonomy concept see Murphy, United Nations Convention for the International Sale of Goods: Creating Uniformity in International Sales Law, 12 Fordham Int'l L.J., (1998), pp.727-750, also available online <http://cisgw3.law.pace.edu/cisg/biblio/murphy.html>.

3. See General Observations on use of the UNIDROIT Principles to Help Interpret the CISG, available online at <http://cisgw3.law.pace.edu/cisg/text/matchup/general-observations.html>.

4. See The Convention on the Law Applicable to Contractual Obligations the so-called Rome Convention of 1980 and The 1986 Hague Convention on the Law Applicable to Contracts for the International Sale of Goods the so-called 1986 Choice of Law Convention.

5. For the positions of the different CISG Contracting States, see Murphy, op. cit.

6. For confirmation that CISG Art. 6 provides the opportunity for the exclusion of the Convention, see the following illustrative case decisions:

    -     Italy 10 March 2000 Suprema Corte di Cassazione [Supreme Court], case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/000310i3.html>;
    -     Germany 12 October 2000 Landgericht [District Court] Stendal, case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/001012g1.html>;
    -     France 6 November 2001 Cour d'appel [Appellate Court] Paris, <http://cisgw3.law.pace.edu/cases/011106f1.html>;
    -     United States 29 January 2003 Federal District Court [Illinois], Ajax Tool Works, Inc. v. Can-Eng Manufacturing Ltd., <http://cisgw3.law.pace.edu/cases/030129u1.html>.

7. See Leete, Contract Formtion Under the United Nations Convention on Contracts for the International Sale of Goods and the Uniform Commercial Code: Pitfall for the Unwary, 6 Temple International and Comparative Law Journal (1992), pp. 193-215, also available online at <http://cisgw3.law.pace.edu/cisg/text/leete6.html>; Ferrari, Specific Topics of the CISG in the Light of Judicial Application and Scholarly Writing, 15 Journal of Law and Commerce (1995), pp. 1-126, also available online at <http://cisgw3.law.pace.edu/cisg/text/franco6.html>; Schlechtriem, Uniform Sales Law in the Decisions of the Bundesgerichtshof [Federal Supreme Court of Germany], available online at <http://cisgw3.law.pace.edu/cisg/biblio/schlechtriem3.html>.

8. For the legislative history of the CISG Art. 6, see Murphy, op. cit.

9. See Murphy, op. cit.; Winship, Changing Contract Practices in the Light of the United Nations Convention: A Guide for Practitioners, 29 International Lawyers (1995), pp. 525-554, also available online at <http://cisgw3.law.pace.edu/cisg/text/winship6.html>.

10. See Murphy, op. cit.

11. See Winship, op. cit.

12. See Enderlein & Maskow, International Sales Law, Oceana Publications, (1992) also available online at <http://cisgw3.law.pace.edu/cisg/biblio/enderlein-art06.html>; Schlechtriem, Uniform Sales Law-The Experience w with Uniform Sales Laws in the Federal Republic of Germany, Juridikrift Tidskrift (1991/92), pp. 1-28, also available online at <http://cisgw3.law.pace.edu/cisg/biblio/schlechtriem3.html>; Ferrari, op. cit.

13. See the following case decisions:

    -     Italy 12 July 2000 Tribunale [District Court] Vigevano, Rheinland Versicherungen v. Atlarex, case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/000712i3.html>;
    -     Austria 22 October 2001 Oberster Gerichtshof [Supreme Court], case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/011022a3.html>;
    -     Switzerland 3 December 2002 Handelsgericht [Commercial Court] St. Gallen, case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/021203s1.html>.

14. See Murphy, op. cit.

15. See Murphy, op. cit.

16. For confirmation that the use of standard terms can exclude the Convention's application see Ferrari, op. cit., Schlechtriem, Uniform Sales Law - The UN Convention on Contracts for the International Sale of Goods, Manz, Viena, (1986), also available online at <http://cisgw3.law.pace.edu/cisg/biblio/schlechtriem-06.html>.

17. See Ferrari, op. cit., Bonell & Liguori, The UN Convention on the International Sale of Goods: A Critical Analysis of Current International Case Law, Uniform Law Review (1997), pp. 385-395, also available online at <http://cisgw3.law.pace.edu/cisg/text/libo6.html>.

18. See Leete, op. cit., Ferrari, op. cit., Bonell & Liguori, op. cit., Enderlein & Maskow, op. cit.; See also the following case decisions:

    -     United States 27 July 2001 Federal District Court [California], Asante Technologies v. PMC-Sierra, at <http://cisgw3.law.pace.edu/cases/010727u1.html>;
    -     Austria 22 October 2001 Oberster Gerichtshof [Supreme Court], case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/011022a3.html>;
    -     Belgium 15 January 2002 Tribunal de commerce [District Court] Namur, case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/020115b1.html>;
    -     United States 11 June 2003 Federal Appellate Court [5th Circuit], BP Oil International v. Empresa Estatal Petroleos de Ecuador, case presentation available at <http://cisgw3.law.pace.edu/cases/030611u1.html>.

19. See Ferrari, op. cit.

20. CISG Art. 6 states: "The parties may exclude the application of this Convention or, subject to article 12, derogate from or vary the effect of any of its provisions." UNIDROIT Principles art. 1.5 states: "The parties may exclude the application of these Principles or derogate from or vary the effect of any of their provisions, except as otherwise provided in the Principles."

21. See Schlechtriem, Uniform Sales Law - The UN Convention on Contracts for the International Sale of Goods, Manz: Vienna, (1986), also available online at <http://cisgw3.law.pace.edu/cisg/biblio/schlechtriem-06.html>.

See also the following case decisions:

    -     Spain 16 November 2000 Audiencia Provincial [Appellate Court] Alicante, case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/001116s4.html>;
    -     Austria 14 January 2002 Oberster Gerichtshof [Supreme Court], case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/020114a3.html>;
    -     Belgium 15 January 2002 Tribunal de commerce [District Court], case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/020115b1.html>;
    -     Switzerland 3 December 2002 Handelsgericht [Commercial Court] St. Gallen, case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/021203s1.html>;
    -     Austria 15 June 1994 Vienna Arbitration proceeding SCH-4318, case presentation including English translation available at <http://cisgw3.law.pace.edu/cases/940615a4.html>.

22. See Ferrari, op. cit.

23. See Official Comments of the UNIDROIT Principles on Art. 1.5, available online at <http://cisgw3.law.pace.edu/cisg/principles/uni6.html#official>. Comment 2: Exclusion or modification may be express or implied. Ibid.

24. See UNIDROIT Principles, Preamble, second sentence.

25. See CISG Arts. 89, 91, 99, 100 and 101.

26. See CISG Arts. 92, 95, 96, 97, 98.

27. See CISG Arts. 90, 93 and 94.

28. See Ulrich G. Schroeter, Freedom of Contract: Comparison between Provisions of the CISG (Article 6) and Counterpart Provisions of the Principle of European Contract Law, note 14, also available online at <http://cisgw3.law.pace.edu/cisg/text/peclcomp6.html>.

29. See Schlechtriem, Uniform Sales Law - The UN Convention on Contracts for the International Sale of Goods, Manz, Vienna, (1986), also available online at <http://cisgw3.law.pace.edu/cisg/biblio/schlechtriem-06.html>.

30. See Enderlein & Maskow, op. cit. citing and discussing the opinion of Bonell that CISG except Art. 12 contains other prescriptions that may not be derogated by the contracting parties;

31. See Ferrari, op. cit.

32. See Schlechtriem, Uniform Sales Law - The UN Convention on Contracts for the International Sale of Goods, Manz, Vienna, (1986), also available online at <http://cisgw3.law.pace.edu/cisg/biblio/schlechtriem-06.html>.

33. For example, CISG Arts. 4, 7, 28, etc. See also Ulrich G. Schroeter, Freedom of Contract: Comparison between Provisions of the CISG (Article 6) and Counterpart Provisions of the Principle of European Contract Law, notes 10, 11, 12, 13 and 14, available online at <http://cisgw3.law.pace.edu/cisg/text/peclcomp6.html>.


PECL COMPARATIVE

Freedom of contract: Comparison between provisions of the CISG (Article 6) and counterpart provisions of the Principles of European Contract Law

Ulrich G. Schroeter [*]
July 2002

1. Introduction
2. Freedom of Contract under the CISG and PECL
3. Restrictions to the parties' freedom of contract under the CISG and PECL

3.1 Good faith and fair dealing
3.2 Mandatory rules established by the CISG and PECL themselves
3.3 Mandatory rules of national, supranational and international law
4. Restrictions to the parties' freedom of contract in cases where CISG applies solely because of the parties' choice ("opting in)
5. Conclusions

1. Introduction

CISG Article 6 lays down the general rule that the Convention applies to international contracts of sale of goods, subject to a contrary agreement by the parties. Its counterparts in PECL Articles 1:102 and 1:103 likewise address the principle of freedom of contract and its limitations, but differ from CISG Article 6 in a number of respects. These differences primarily follow from the different legal nature of the two sets of rules -- while the CISG in its Contracting States forms part of the substantive law that the courts have to apply (lex fori), the applicability of the PECL in general requires an agreement of the parties that submits their contract to the Principles (PECL 1:101) -- but also reflect the different approaches that the drafters of the CISG and the PECL have adopted with respect to the limitations to the freedom of contract, in particular those limitations arising from so-called mandatory rules of law. As a consequence, the use of PECL Articles 1:102 and 1:103 as an aid to interpret CISG Article 6 is subject to a number of important caveats discussed below. [page 257][*]

2. Freedom of contract under the CISG and the PECL

The principle of freedom of contract, one of the basic principles underlying the international law of contracts in general, has been recognized by both the drafters of the CISG and of the PECL. The wording of CISG Article 6 and PECL Article 1:102(2) is in fact quite similar, and the prominent position of both provisions among the first articles in the Convention and the PECL illustrate the important role of the parties' autonomy.[1]

Articles 1:101(2), (3) and 1:103(1) PECL additionally address a somewhat related issue: the choice of the PECL as the law applicable to the contract. This issue concerns the applicability of the respective set of rules. The question of applicability may also arise under the CISG, albeit in different form: While the PECL are only applicable where the parties have chosen the Principles and the law otherwise applicable allows such a choice, the Convention is applicable as a matter of law whenever the prerequisites of CISG Article 1(1)(a), (b) are fulfilled (and none of the exceptions in CISG Articles 2-5 applies).[2] The parties' choice of the CISG as the law applicable to their contract will therefore lead to the Convention's applicability under CISG Article 1(1)(b) if the rules of private international law of the forum (being situated in a Contracting State) accept the principle of party autonomy,[3] as it will under the private international law rules of most non-Contracting States.[4] [page 258] On the contrary, under CISG Article 1(1)(a), which covers cases where both parties have their places of business in different Contracting States (statistically by far the most important group of CISG contracts), any agreement of the parties or any other indication that the parties were even aware of the CISG's applicability is unnecessary [5] -- the Convention is, unlike the PECL, not merely a model law or Restatement of principles of contract law, but is applicable by law whenever the parties have not excluded its application (so-called "opting out").[6]

3. Restrictions to the parties' freedom of contract under the CISG and the PECL

More important differences exist with respect to the restrictions to which the CISG and the PECL submit the parties' freedom to exclude the respective set of rules [page 259] and modify the effect of their provisions. The Principles list three different categories of restrictions:

3.1 Good faith and fair dealing

According to PECL Article 1:102(1), the parties may determine the contents of their contract "subject to the requirements of good faith and fair dealing." CISG Article 6 does not contain a similar limitation to the freedom of contract. During the 1980 Vienna Diplomatic Conference, a proposal to add a second sentence to the wording of CISG Article 6 stating that "the obligations of good faith, diligence and reasonable care prescribed by this Convention may not be excluded by agreement" was rejected by a substantial majority.[7]

However, the principles of good faith and fair dealing may under certain circumstances also affect the content of CISG contracts: This may, on one hand, be the case where, according to the applicable national law, the validity of the contract or of any of its provisions (CISG Article 4(a)) is subject to these principles. On the other hand, a number of commentators hold that CISG Article 7 similarly requires that the principles of good faith and fair dealing are to be taken into account when determining the parties' rights and obligations under the contract, although this interpretation is subject to dispute.[8]

3.2 Mandatory rules established by the CISG/PECL themselves

Secondly, PECL Article 1:102(1) and (2) subjects the freedom of contract to the mandatory rules established by these Principles. Such rules of mandatory nature are contained in PECL Articles 4:118 (limiting the exclusion or restriction of remedies for fraud, threats, excessive benefit or unfair advantage-taking, mistake [page 260] and incorrect information), 6:105 (dealing with the determination of the price and other contractual terms where it is to be determined by one party and that party's determination is grossly unreasonable) and 8:109 (declaring the exclusion or restriction of remedies for non-performance inadmissible when it would be contrary to good faith and fair dealing to invoke that restriction).

CISG Article 6, on the contrary, names CISG Article 12 as the one provision in the Convention that the parties may not derogate from, thus making Article 12 the only mandatory rule in the CISG.[9] Although some commentators have suggested that other provisions in the Convention (such as Articles 4,[10] 7,[11] 28,[12] 89 et seq.[13]) are also mandatory despite not being mentioned in CISG Article 6, it is submitted that none of these articles restrict the parties' freedom of contract.[14] [page 261]

Thus, the principle of contractual freedom in the Convention goes beyond its counterpart provision in the PECL. The absence of limitations similar to the mandatory PECL rules mentioned above should not come as a surprise as the Convention's scope is restricted to transactions and issues which, within the various domestic laws, are traditionally governed by provisions of a non-mandatory character,[15] while the PECL additionally deal, inter alia, with questions of contractual validity and are also intended to apply to contracts involving consumers.[16]

3.3 Mandatory rules of national, supranational and international law

The third and last category of restrictions to the freedom of contract under the PECL covers the mandatory rules of national, supranational and international law (PECL Article 1:103(1), (2)). According to PECL Article 1:103(1), national mandatory rules are applicable if the law otherwise applicable does not allow their exclusion by way of choice by the parties, and PECL Article 1:103(2) requires courts and arbitrators to give effect to mandatory rules of national, supranational and international law which are applicable irrespective of the law governing the contract (mandatory rules carried by a strong public policy, so-called "directly [page 262] applicable rules" or règles d'application immédiate). The Principles thus demand that, when applying the law, a distinction is drawn between rules of mandatory and non-mandatory nature, between mandatory rules of national, supranational and international law and between "ordinary" mandatory rules and règles d'application immédiate -- decisions that can be difficult to make and will accordingly be often unforeseeable for the parties.[17]

Under the CISG, the situation is different: As far as matters governed by the Convention - either by way of an express provision or by way of its general principles identified in accordance with CISG Article 7(2) -- are concerned, no mandatory rule of national, supranational and international law may be applied.[18] This follows from the fact that the Contracting States have accepted an obligation under public international law to apply the Convention instead of any other legal rule wherever the Convention provides uniform rules.[19] Thus, provisions outside the CISG are -- irrespective of their mandatory or non-mandatory nature -- superseded if their subject matter is already covered by the Convention.

As not all matters which are potentially relevant to international sales contracts are governed by the Convention, mandatory rules of national, supranational and international law are to be given effect whenever a matter is outside the CISG's scope. In this respect, difficult questions may arise under CISG Article 4(a), which stipulates that "except as otherwise expressly provided in this Convention, it is not concerned with [...] the validity of the contract or of any of its provisions or of any usage". This provision seems to leave ample room for the application of mandatory rules that deal with questions of validity. However, CISG Article 4(a) sets out an important -- and often overlooked -- additional condition by requiring courts and arbitrators to establish in advance that the Convention is not itself concerned with the validity question regulated by the otherwise applicable mandatory provision. Accordingly, not all rules of national, supranational or international law [page 263] prescribing that a contract or one of its clauses is void or invalid are applicable to CISG contracts by virtue of CISG Article 4(a).[20]

Under CISG Article 4(a), it has thus to be taken into account not only whether the national provision has an effect on the validity of certain clauses in a CISG contract, but also why the national law imposes the sanction of invalidity. As a result, for instance, the doctrine on vices cachés under French law is inapplicable to CISG contracts although it addresses the validity of contractual clauses limiting the seller's liability as it does so by defining rules on the lack of conformity of the goods on which the Convention itself contains an exhaustive regulation.[21] The same applies to the Common Law validity doctrine of consideration, which conflicts with the express language of CISG Article 29(1).[22] Both examples are indications of one of the Convention's main contributions to the modern law for international sales which has been described by Ernst Rabel as "avoiding the awesome relics of the dead past that populate in amazing multitude" the national sales laws.[23] Other national mandatory rules remain applicable under CISG Article 4(a), but only under the condition that the CISG's provisions and fundamental principles are taken into account when they are applied to a CISG contract: If, for example, the national law declares clauses in general business terms invalid if they are incompatible with the [page 264] essential principles of the rules from which the parties are derogating,[24] the relevant essential principles are those of the Convention.[25]

4. Restrictions to the parties' freedom of contract in cases where the CISG applies solely because of the parties' choice ("opting in")

The limited relevance of mandatory rules of national, supranational or international law for CISG contracts that has been outlined above (see 3c, supra), however only extends to international contracts of sale to which the Convention applies by virtue of CISG Articles 1-5. The legal situation is different where the parties have chosen the Convention's rules when the CISG would otherwise not be applicable: Nothing in the CISG precludes such a contractual agreement leading to the applicability of the Convention (so-called "opting in").[26] It can be useful when two parties from non-Contracting States fail to reach agreement on which national law should govern their contract,[27] where "string contracts" or "chain transactions" are at stake which involve parties from CISG Contracting States and from non-Contracting States alike and which may therefore be only partially subject to the Convention, if no explicit choice in favor of the CISG is made,[28] and may be inserted into [page 265] distribution contracts or other frame contracts applying to sales to international and domestic customers alike.[29]

Thus, whenever the CISG applies solely because of the parties' choice and without the requirements of CISG Articles 1-5 having been met, mandatory rules of national, supranational or international law remain relevant and need to be applied by courts and arbitrators,[30] as in these cases the CISG resembles the PECL and other Restatements.[31] Accordingly, in such a setting, PECL Article 1:103 may be used as an aid in interpreting or supplementing the CISG.

5. Conclusions

While the parties' freedom of contract plays a very important role within both the CISG and the PECL, the two instruments are marked by a number of important differences that concern the legal restrictions to the parties' autonomy. The legal nature of the CISG as an international convention has allowed its drafters to go beyond the limits laid down in PECL Articles 1:102 and 1:103.[32] The specific scope of the freedom of contract under CISG Article 6 therefore makes it difficult to use the PECL as an aid to the interpretation of the said CISG provision. [page 266]


FOOTNOTES

* The author is a member of the Graduiertenkolleg "Europäisches Privat- und Wirtschaftsrecht" at the Humboldt-University in Berlin.

This comparative is also published at 6 Vindobona Journal of International Commercial Law and Arbitration (2002-2) 257-266. Pagination to that publication is provided to facilitate citation to the Vindobona text.

A match-up of CISG Article 6 and PECL Articles 1:102 [Freedom of contract] and 1:103 [Mandatory law] is available at <http://cisgw3.law.pace.edu/cisg/text/peclcomp6.html>. The match-up is accompanied by:

-   Comments on PECL Articles 1:102 and 1:103 authored by the European Commission describing and illustrating the manner in which they are to be applied; and
-   Notes that compare these PECL Articles with continental and common law domestic rules, doctrine and jurisprudence.

1. Cf. Michael Joachim Bonell, Article 6, in Commentary on International Sales Law, no. 1.2 (Cesare Massimo Bianca & Michael Joachim Bonell eds., 1987): "the prevailing view in UNCITRAL was in favour of the widest possible recognition of the parties' autonomy;" Kurt Siehr, Artikel 6, in Kommentar zum UN-Kaufrecht, no. 1 (Heinrich Honsell ed., 1997): the drafters of the CISG wanted to grant the parties a wide discretion in drafting their contract; see also Landgericht [Regional Court] Stendal, Germany, 12 October 2000, Internationales Handelsrecht 2001, at 32, where the court stated that CISG Art. 6 affirms the principle of party autonomy; for English translation of the text of this case, go to <http://cisgw3.law.pace.edu/cases/001012g1.html>.

2. For agreements to apply the Convention to transactions that fall outside the scope of CISG Articles 1-5, see 4, infra.

3. In practice, contractual choice of law clauses usually do not point to the Convention as such, but rather to the law of a certain State: If this State happens to be a Contracting State, the CISG will generally apply, as it forms part of the legal system of each Contracting State: see relevant case law, e.g.:

Bundesgerichtshof, [Federal Supreme Court] Germany 23 July 1997, Neue Juristische Wochenschrift (1997) 3309, at 3310 [Case presentation in English available at <http://cisgw3.law.pace.edu/cases/970723g1.html>]; Oberster Gerichtshof, [Supreme Court] Austria 22 October 2001, 1 Ob 77/01[English translation available at <http://cisgw3.law.pace.edu/cases/011022a3.html>]; U.S. Federal District Court [New York], 26 March 2002 (St. Paul Insurance Company et al. v. Neuromed Medical Systems & Support et al.), available on-line at <http://cisgw3.law.pace.edu/cases/020326u1.html >, where the court stated:

"The parties concede that pursuant to German law, the U.N. Convention on Contracts for the International Sale of Goods ("CISG") governs this transaction because (1) both the U.S. and Germany are Contracting States to that Convention, and (2) neither party chose, by express provision in the contract, to opt-out of the application of the CISG. The CISG aims to bring uniformity to international business transactions, using simple, non-nation specific language. To that end, it is comprised of rules applicable to the conclusion of contracts of sale of international goods. In its application regard is to be paid to comity and interpretations grounded in its underlying principles rather than in specific national conventions. See CISG art. 7(1), (2). Germany has been a Contracting State since 1991, and the CISG is an integral part of German law. Where parties, as here, designate a choice of law clause in their contract -- selecting the law of a Contracting State without expressly excluding application of the CISG -- German courts uphold application of the Convention as the law of the designated Contracting state. To hold otherwise would undermine the objectives of the Convention which Germany has agreed to uphold." [citations omitted]

See also Franco Ferrari, Artikel 6, in Kommentar zum Einheitlichen UN-Kaufrecht, no. 22 (Peter Schlechtriem ed., 3rd ed. 2000, with numerous references to international case law).

Whether an "isolated" choice of the CISG as the law applicable to the contract is valid and effective depends on the relevant conflict of law rule. Under the EC Convention of the Law Applicable to Contractual Obligations (Rome, 19 June 1980), this question is heavily disputed; cf. Kurt Siehr, Der internationale Anwendungsbereich des UN-Kaufrechts, 52 Rabels Zeitschrift für ausländisches und internationales Privatrecht (1988), at 612. See also John O. Honnold, Uniform Law for International Sales under the 1980 United Nations Convention, no. 83 (3rd ed. 1999) who argues that full effect should be given to the parties' agreement to apply the Convention.

4. In States that have not ratified the Convention, the courts do not apply CISG Article 1(1)(b) -- which, for lack of ratification, does not form part of the lex fori -- but look to the national private international law rules. Cf. C.J.G. Morse, Conflict of Laws, in Benjamin's Sale of Goods, no. 25-025 (Anthony Gordon Guest ed., 5th ed. 1997): "It is therefore possible that a United Kingdom court may have to apply the Vienna Convention on the International Sale of Goods 1980, if the law applicable under the Rome Convention is found to be the law of a country which is a party to that Convention and that country would regard that Convention as applicable." A choice of law clause will thus for all practical purposes yield identical results in Contracting States and non-Contracting States.

5. Alfonso-Luis Calvo Caravaca, Articulo 6, in La Compraventa Internacional de Mercaderias: Comentario de la Convencion de Viena, at 100 (Luis Díez-Picazo y Ponce de León ed., 1998); Ferrari, supra note 3, no. 23; Burghard Piltz, Internationales Kaufrecht (1993), § 2 no. 108.

6. Ferrari, supra note 3, no. 6; Ulrich Magnus, Artikel 6, in Julius von Staudingers Kommentar zum Bürgerlichen Gesetzbuch mit Einführungsgesetz und Nebengesetzen, Wiener UN-Kaufrecht (CISG) (1999), no. 2.

7. The Canadian proposal (A/CONF.97/C.1/L.10) as orally amended aimed at revising the draft of CISG Article 6 to read as follows: "The parties may exclude the application of this Convention or, subject to Article 11 [became CISG Article 12], derogate from or vary the effect of any of its provisions. However, except where the parties have wholly excluded this Convention, the obligations of good faith, diligence and reasonable care prescribed by this Convention may not be excluded by agreement." See U.N. Official Records (1981), p. 86.

CISG Art. 6 thus goes beyond the language of the Uniform Commercial Code § 1-102(3) which contains a restriction similar to the one mentioned above, cf. E. Allan Farnsworth, Review of Standard Forms or Terms Under the Vienna Convention, 21 Cornell International Law Journal (1988) 439, at 441 note 8 [available on-line at <http://cisgw3.law.pace.edu/cisg/biblio/farns1.html>].

8. To the present writer, this interpretation of CISG Article 7 seems doubtful. In this respect, see John Felemegas, Editorial remarks on CISG Article 7, available on-line at <http://cisgw3.law.pace.edu/cisg/text/e-text-07.html>.

9. Rolf Herber, Artikel 6, in Commentary on the UN Convention on the International Sale of Goods, no. 5 (Peter Schlechtriem ed., 1998); Vincent Heuzé, La vente internationale de marchandises (1992), no. 97; Honnold, supra note 3, no. 74; Helga Rudolph, Kaufrecht der Export- und Importverträge (1996), Art. 6 no. 1; Siehr, supra note 1, no. 11.

10. Bonell, supra note 1, no. 3.4.

11. Bonell, supra note 1, Article 7, no. 3.3, who argues that "any legislation has to be interpreted in accordance with the criteria specifically laid down in it or generally adopted within the legal system from which it emanates." This approach accepts that the parties to an international sales contract are free to choose between the application of CISG and the application of a particular domestic law, but insists that once the contracting parties have accepted that their contract of sale is to be governed by the CISG, the provisions of the Convention must be applied in accordance with CISG Article 7, which provides the Convention's in-built interpretation rules.

12. Bonell, supra note 1, no. 3.4; Ferrari, supra note 3, no. 9; Magnus, supra note 6, no. 28; Gert Reinhart, UN-Kaufrecht (1991), Art. 28 no. 3.

13. Ferrari, supra note 3, no. 9.

14. Derogating from CISG Article 4 would make little sense, as it would lead to the Convention being applicable to questions of contractual validity and transfer of property on which it contains no rules (Ferrari, supra note 3, no. 11; Rudolph, supra note 9, no. 1).

An agreement by the parties on principles of interpretation other than those in CISG Article 7 is allowed under the parties' right to modify the Convention's provisions according to their own preferences (Ferrari, supra note 3, no. 10; Magnus, supra note 6, no. 55). Professor Bonell's argument against allowing parties to do away with CISG Article 7 via the autonomy given to them in CISG Article 6 (see supra note 11) seems, in the last analysis, unconvincing: CISG Article 6 expressly states that the parties may not only accept or exclude the Convention's application in toto, but also derogate from or vary the effect of any provision they consider undesirable despite the fact that the drafters of the CISG included it. Whenever such a contractual modification of one of the CISG's articles occurs, a court judgment or arbitral award applying the Convention to that particular contract cannot insofar be regarded as a persuasive precedent (which is to be taken into account by other courts under CISG Article 7) as it does not deal with the interpretation of the CISG's original rules, but merely with a modified version of the Convention. A scenario involving a contractual derogation from CISG Article 7 does in this respect not differ from cases where modifications of other provisions are at stake: Should the parties -- which, it is submitted, will rarely occur in practice -- choose to have, e.g., the CISG "as interpreted by German courts" or "as construed according to the principles of English law" govern their contract, this constitutes an admissible use of their party autonomy according to CISG Article 6, but deprives any judgment or arbitral award dealing with this contract of sale of its future persuasive value under CISG Article 7(1).

Under CISG Article 28, a court is not required to grant specific performance if, under its "own law", it would not do so. If the parties, by explicitly derogating from CISG Article 28 in their contract, have agreed on one or both parties' right to specific performance, it can be assumed that the court would carry out the agreement of the parties (Amy H. Kastely, The Right to Require Performance in International Sales: Towards an International Interpretation of the Vienna Convention, 63 Washington Law Review (1988), at 642 [available on-line at <http://cisgw3.law.pace.edu/cisg/biblio/kastely1.html>]; Ole Lando, Article 28, in Commentary on International Sales Law, no. 3.1 (Cesare Massimo Bianca & Michael Joachim Bonell eds., 1987)).

While the parties cannot modify the Contracting States' obligations under public international law arising from CISG Articles 89 et seq., they may modify the Final Provisions' effect on their own contract, e.g., by agreeing on the Convention's applicability although the prerequisites of CISG Article 100 are not met: CISG Articles 89 et seq. are thus subject to the parties' freedom of contract as far as they deal with the Convention's sphere of application (see Siehr, supra note 1, no. 11).

15. Bonell, supra note 1, no. 2.1; Calvo Caravaca, supra note 5, at 93; Honnold, supra note 3, no. 74.

16. Cf. Ole Lando & Hugh Beale, Introduction, in Principles of European Contract Law, Parts I and II (2000), at xxv. Purchases by consumers are excluded from the Convention's scope by virtue of CISG Article 2(a), although the CISG will apply if the seller neither knew nor ought to have known that the goods were bought for personal, family or household use -- a type of situation that may become more common as more consumers purchase goods over the internet. Sales by consumers are, on the contrary, not excluded from the Convention's scope (Herber, supra note 9, Article 2 no. 11; Magnus, supra note 6, Artikel 2 no. 18).

17. The vagueness of the term "mandatory" was also criticized during the discussions within UNCITRAL; see Honnold, supra note 3, no. 79.

18. Fritz Enderlein & Dietrich Maskow, International Sales Law (1992), Art. 6 no. 3.1 [available on-line at <http://cisgw3.law.pace.edu/cisg/biblio/enderlein.html>]; Herber, supra note 9, no. 24; Manuel Lorenz, Artikel 6, in International Einheitliches Kaufrecht: Praktiker-Kommentar und Vertragsgestaltung zum CISG, no. 20 (Wolfgang Witz, Hanns-Christian Salger & Manuel Lorenz eds., 2000); Magnus, supra note 6, no. 55; Reinhart, supra note 12, Art. 6 no. 8; Rudolph, supra note 9, no. 6.

19. This has been aptly described by Professor Honnold as "the commitment that Contracting States make to each other: We will apply these uniform rules in place of our own domestic law on the assumption that you will do the same" .(Honnold, supra note 3, no. 103.2); see also Calvo Caravaca, supra note 5, at 100.

20. Ferrari, supra note 3, Artikel 4 no. 13; Herber, supra note 9, no. 13; Honnold, supra note 3, no. 65; Magnus, supra note 6, Artikel 4 no. 18. For an interesting discussion on how drafters of standard terms should deal with the interaction between the national rules on validity and the Convention, see Farnsworth, supra note 7, at 443 et seq.

See also Bundesgerichtshof, [Federal Supreme Court, Germany], 31 October 2001, Neue Juristische Wochenschrift (2002) 370, at 371 where the court ruled on the CISG's requirements for the inclusion of standard terms and conditions into contracts of sale. [Case presentation, including English translation and commentary available at <http://cisgw3.law.pace.edu/cases/011031g1.html>]. The court held that CISG Article 8(2) requires the user of standard terms to transmit the respective text to the other party or make it available in another way, and justified its interpretation inter alia with the assumption that "a control of the content of standard terms and conditions under national law (CISG Article 4(a)) is not always guaranteed." While the decision is likely to receive some criticism for imposing excessively strict requirements for the inclusion of standard terms, it indicates a tendency to limit the scope of the validity exception in CISG Article 4(a) in favor of the Convention's own rules.

21. Bernard Audit, La vente internationale de marchandises: Convention des Nations-Unies du 11 avril 1980 (1990), at 115 et seq.; Heuzé, supra note 9, no. 100.

22. Audit, supra note 21, at 32, 74; Heuzé, supra note 9, no. 201; Honnold, supra note 3, no. 204.1 et seq.; see also Peter Schlechtriem, Artikel 29, in Kommentar zum Einheitlichen UN-Kaufrecht, no. 3 (Peter Schlechtriem ed., 3rd ed. 2000).

23. Ernst Rabel, The Hague Conference on the Unification of Sales Law, 1 American Journal of Comparative Law (1952), at 61. See also Honnold, supra note 3, no. 30: "One may delight in legal antiques and in the patina of ingenious circumlocutions that have had to substitute for fundamental reform but these aesthetics may not be appreciated by a modern merchant and, more especially, by his trading partner from a different legal tradition."

24. See for example § 307(2) Nr. 1 of the German Civil Code.

25. Herber, supra note 9, no. 28; Robert Koch, Wider den formularmäßigen Ausschluss des UN-Kaufrechts, Neue Juristische Wochenschrift (2000), at 910; Lorenz, supra note 18, no. 14; Magnus, supra note 6, Artikel 4 no. 26; Piltz, supra note 5, § 2 no. 140; Harry Schmidt, in AGB-Gesetz, Anh. § 2 no. 12 (Peter Ulmer, Hans Erich Brandner & Horst-Dieter Hensen eds., 9th ed. 2001); Walter F. Lindacher, in AGB-Gesetz, Anh. § 2 no. 75 (Manfred Wolf, Norbert Horn & Walter F. Lindacher eds., 4th ed. 1999).

In Oberster Gerichtshof, [Supreme Court, Austria], 7 September 2000, Recht der Wirtschaft (2000), no. 9, the court held that the parties can derogate from CISG Article 49(1) and restrict the buyer's rights under the condition that these clauses are valid under the applicable domestic (here: German) law according to CISG Article 4. However, even if the changes are valid according to the rules of the applicable domestic law, such rules must not contradict the fundamental principles (Grundwertungen) of the CISG. The Court stated that one of the CISG's fundamental principles is the right for the buyer to avoid the contract, which the buyer must have as ultima ratio where the seller after an additional period of time still has not delivered the goods or where the goods in spite of the seller's remedies are still essentially useless. This right to avoid the contract can only be validly restricted if the buyer at least retains the right to damages. [Case presentation available in English at <http://cisgw3.law.pace.edu/cases/000907a3.html>].

26. Audit, supra note 21, at 41; Enderlein & Maskow, supra note 18, Art. 6 no. 3.2; Herber, supra note 9, no. 31; Honnold, supra note 3, no. 79 et seq.; Lorenz, supra note 18, no. 21; Reinhart, supra note 12, Art. 6 no. 9. For the discussions during the 1980 Vienna Diplomatic Conference, see U.N. Official Records (1981), p. 252 et seq.

27. Calvo Caravaca, supra note 5, at 100; Reinhart, supra note 12, Art. 6 no. 89.

28. Audit, supra note 21, at 41; Honnold, supra note 3, no. 82; Lorenz, supra note 18, no. 21; Burghard Piltz, Entscheidungen des BGH zum CISG, Internationales Handelsrecht -- Beilage zu der Zeitschrift Transportrecht (1999), at 14.

29. Audit, supra note 21, at 40; Heuzé, supra note 9, no. 125.

30. Audit, supra note 21, at 41; Bonell, supra note 1, no. 3.5.1; Calvo Caravaca, supra note 5, at 101; Enderlein & Maskow, supra note 18, Art. 6 no. 3.2; Herber, supra note 9, no. 31; Heuzé, supra note 9, no. 127; Honnold, supra note 3, no. 84; Reinhart, supra note 12, Art. 6 no. 9; contra Lorenz, supra note 18, no. 21; Siehr, supra note 1, no. 15.

31. Honnold, supra note 3, no. 84; Magnus, supra note 6, nos. 62, 65; Rudolph, supra note 9, no. 9.

32. See also Rudolph, supra note 9, no. 1: CISG Article 6 grants the parties more freedom than most national laws do; Farnsworth, supra note 7, at 441 note 8 (for the U.C.C.).


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