The owner of Schonheit, an upscale spa and beauty salon in Germany, met the marketers for a new French skin care line called Serein at a recent industry trade event. Serein products are made and distributed in France, and the owners of Schonheit see an opportunity to become the only distributors of the products in Germany. Identify the key elements that should be included in a contract between Schonheit and Serein to protect both companies