The United Nations Convention on Contracts for the International Sale of Goods (CISG) entered into force on January 1, 1988 for the 11 contracting parties. In such instances, Seller shall properly complete and submit the applicable Form W8 or Form 817, to Cook when goods or Services are provided.The CISG applies to contracts for the sale of goods between parties that are in different signatory countries. These are the terms and conditions of sale (the "Terms") for products and related materials (collectively, the "Products").