1[1]CISG[10 April 1980] Art.11:A contract of sale need not be concluded in or evidenced by writing and is not subject to any other requirement ad to form.It may be proved by any means,including witnesses.
2[2]Vienna Convention on the Law of Treaties[23 May 1969] Art.2.1(d):"reservation" means a unilateral statement,however phrased or named,made by a State,when signing,ratifying,accepting,approving or acceding to a treaty,whereby it purports to exclude or to modify the legal effect of certain provisions of the treaty in their application to that State.
3[7]CISG[10 April 1980]Art.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 had his place of business in that State.
4[8]CISG[10 April 1980] Art.12: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 a Contracting State which has made a declaration under article 96 of this Convention,The parties may not derogate from or rary6 the effect of this article.
