The purpose of the CISG is to provide a modern, uniform and fair regime for contracts for the international sale of goods. An international sales contract is an agreement between a buyer and a seller that identifies the parties in the transaction, the goods or services being sold.You must fill out an application and submit it to the Cuyahoga County Treasury Office. Cuyahoga County Treasurer. This course provides students an opportunity to explore the breadth of business topics presented within the various Business Administration degrees. Resources to help you successfully register to do business with Cuyahoga County. Exclusion of the United Nations Convention on Contracts for the International Sale of Goods. The application of the United Nations Convention on. This Agreement is a contract for services and not a sale of goods. The United Nations Convention on Contracts for the International Sale of Goods shall not be applicable to these.