New York law includes an almost inexhaustible set of rules and precedents covering a wide spectrum of business transactions. 18 fixed" or "if the seller delivers a quantity of goods greater than that provided for in the contract.This 80-minute webinar tells you why. Under CISG the seller is obligated to deliver goods of the quality, description and packing called for under the contract. Contracts involving the sale of goods or services must adhere to laws designed to protect consumers. When dealing with the CISG, you must explicitly state that you want to opt out of it in your choice of law clause. The Convention For The International Sale of Goods (CISG) establishes substantive new rules for international contracts. Some cases illustrate the complexities involved in a contract for the sale of goods better than others. Buyers and Sellers of commercial real property in New. York City negotiate their transactions in a difficult envi- ronment.