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The Futility of Unification and Harmonization in International ...

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firm <strong>and</strong> then sells them to the producer for <strong>in</strong>stallation <strong>in</strong> the f<strong>in</strong>ished product, <strong>and</strong>, if so, are thecartridges a substantial part <strong>of</strong> the f<strong>in</strong>ished product?A further source <strong>of</strong> <strong>in</strong>determ<strong>in</strong>ancy <strong>in</strong>volves the dist<strong>in</strong>ction made <strong>in</strong> Article 4(a) between, on theone h<strong>and</strong>, issues <strong>of</strong> contract formation <strong>and</strong> rights <strong>and</strong> obligations aris<strong>in</strong>g from a contract <strong>and</strong>, on theother h<strong>and</strong>, questions <strong>in</strong>volv<strong>in</strong>g the validity <strong>of</strong> contractual provisions. Accord<strong>in</strong>g to Article 4(a), the50CISG has no bear<strong>in</strong>g on validity issues, which local law must resolve. But what dist<strong>in</strong>guishes theeffectiveness <strong>of</strong> a contractual provision from its validity? If national law, for example, requires salesprices to be states <strong>in</strong> local currency <strong>and</strong> a contract covered by the Convention refers only to U.S.dollars, does local law <strong>in</strong>validate the agreement or may we consider this an acceptable formulaic priceprovision under the Convention?A f<strong>in</strong>al issue <strong>of</strong> coverage <strong>in</strong>volves the right <strong>of</strong> parties under Article 6 to exclude the application51<strong>of</strong> the Convention altogether or on a provision-by-provision basis. <strong>The</strong> CISG nowhere <strong>in</strong>dicateswhat process the parties must undertake to achieve such an exclusion. Does adoption <strong>of</strong> a manifestly<strong>in</strong>consistent provision do the trick, or must the contract refer to the CISG to disavow it? What aboutthe case where one party supplies a form (say a purchase order) say<strong>in</strong>g the CISG does not apply, <strong>and</strong>the other party’s form (say an <strong>in</strong>voice) does not address the issue?None <strong>of</strong> these problems about the uncerta<strong>in</strong> scope <strong>of</strong> the CISG would matter so much if partiescould freely opt <strong>in</strong>to the Convention. But the CISG does not purport to obligate its signatory statesto permit parties to non<strong>in</strong>ternational transactions to choose to apply CISG rules. What we have<strong>in</strong>stead is a world where parties who wish to come under the CISG face considerable uncerta<strong>in</strong>ty asto whether they do <strong>and</strong> <strong>in</strong> any event have no power to guarantee that the Convention will apply, <strong>and</strong>where parties who wish to avoid the CISG have no guidance as to what they must do to get out fromunder it.Also consider how the CISG deals with problems <strong>of</strong> determ<strong>in</strong><strong>in</strong>g what commitments an otherwisevalid contract conta<strong>in</strong>s. Suppose a seller <strong>and</strong> buyer send purchase orders <strong>and</strong> <strong>in</strong>voices that purportto specify the terms <strong>of</strong> the agreement, that these forms differ significantly <strong>in</strong> their content, <strong>and</strong> thatthe seller ships, <strong>and</strong> the buyer takes possession <strong>of</strong> the goods without either advert<strong>in</strong>g to the conflictbetween their forms. Article 19 <strong>of</strong> the CISG follows almost verbatim Article 2-206 <strong>of</strong> the UCC,52which <strong>of</strong>fers one much-criticized solution to this dilemma. <strong>The</strong> UCC, however, deals both withcases where the discrepancy between the conflict<strong>in</strong>g forms is significant <strong>and</strong> where it is not, <strong>and</strong>provides rules <strong>in</strong> both situations to determ<strong>in</strong>e which terms apply. Article 19, by contrast, is silent asto what happens if the <strong>of</strong>feree (such as a seller dispatch<strong>in</strong>g an <strong>in</strong>voice <strong>in</strong> response to an earlierpurchase order) proposes materially different terms.2550Id. Art. 4(a).51Id. Art. 6.52Compare id. Art. 19 with UNIFORM COMMERCIAL CODE § 2-207. See generally Douglas G. Baird & RobertWeisberg, Rules, St<strong>and</strong>ards, <strong>and</strong> the Battle <strong>of</strong> the Forms: A Reassessment <strong>of</strong> § 2-207, 68 VA. L. REV. 1217 (1982).

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