Adopted in Vienna on April 11, 1980, and effective on January 1, 1988, CISG provides a uniform legal framework for the international sale of movable goods. Specifically, the Convention sets out specific rules regarding contract formation, the obligations of the buyer and seller, delivery, conformity of goods, and remedies for non-performance, thereby reducing uncertainties associated with cross-border trade and litigation risks. The principle of private autonomy of the contracting parties remains reserved, as they retain the right to totally or partially exclude the application of the Convention.

https://uncitral.un.org/sites/uncitral.un.org/files/media-documents/uncitral/en/19-09951_e_ebook.pdf