CISG law and forms govern commercial sales transactions between businesses in San Diego and businesses in Mexico. The next step is to negotiate a foreign sales agreement.There is certain information you need to provide, and many legal issues to consider. This form does not take the place of an agreement and all sole source requests for a period of one year or longer will require the submission of an agreement. How to Do Business with the Port Workshop Series. Prepare your company to gain from interacting with international customers. Distributor shall have the non-exclusive right to purchase from Xilinx and distribute the product for resale in the Territory.