In this webinar, attorney and licensed customs broker Jack Shelton explains the fundamentals of a sales contract including why you need a written contract. I'm excited today to take you through the beginning steps of how your business can pursue contract opportunities with the state of California.The United Nations Convention on Contracts for the. International Sale of Goods shall not apply to this Contract. Convention on Contracts for the International Sale of Goods (CISG). A choiceoflaw provision in a contract for the sale of goods should be the final word on what law applies, correct? He has the experience, knowledge and unique qualifications to ensure all of your agreements are enforceable in the California Courts. Like.