Art. 9 CISG

(1) The parties are bound by any usage to which they have agreed and by any practices which they have established between themselves.

(2) The parties are considered, unless otherwise agreed, to have impliedly made applicable to their contract or its formation a usage of which the parties knew or ought to have known and which in international trade is widely known to, and regularly observed by, parties to contracts of the type involved in the particular trade concerned.

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Secretariat Commentary

The Secretariat Commentary on Art. 8 of the 1978 New York Draft, predecessor to Art. 9 CISG, gives insight into the drafters' unterstanding on the eve of the 1980 Vienna Diplomatic Conference.

Commentary on the Draft Convention on Contracts for the International Sale of Goods, prepared by the Secretariat (UN Doc. A/CONF.97/5), in: United Nations Conference on Contracts for the International Sale of Goods, Vienna, 10 March – 11 April 1980, Official Records: Documents of the Conference and Summary Records of the Plenary Meetings and of the Meetings of the Main Committees, New York: United Nations (1991), pp. 14 et seq., at pp. 18—19

Overview of case law on Art. 9 CISG: UNCITRAL Digest

The UNCITRAL Digest on the CISG can be used as a starting point to discover the relevant case law on this article.

2016 UNCITRAL Digest of case law on Art. 9 CISG