Thorough knowledge of substantive law rules and principles is imperative in drafting a good contract. At the domestic level, a working knowledge of the Uniform Commercial Code (UCC) provides a solid foundation for drafting a sales contract. At the international level, however, the general principles of contract law are less specific and are applied sporadically by national courts. Thus, it may be necessary to know the law of the country of your foreign contracting party in order to avoid misunderstandings. Cultural and language differences, however, may prevent a contract from ever being formed. Knowledge of the other party’s culture and negotiating style is important if an initial inquiry is to develop into a long-term contractual relationship.