Basics and some examples of acceptance of transnational commercial law in Iranian law

Transnational trade usage is the most important source of international commercial law which is based on the course of conduct and practices.Despite the acceptance and application of trade usage in commercial relations, there are some ambiguities regarding its nature, identification and its binding force as a legal rule in national courts procedure. Lack of an international legislative body in international commercial law strengthen the stand of  trade usage  as source of law.Today, reflection of the transnational trade usage in international conventions and documents has reduced doubts about their credibility and reliability; hence, tendency to accept and enforce the rules of trade usage in commercial relations has increased.In Iranian legal system and practice of national courts, reference to and application of trade usage and Lex moratoria in commercial case have increased. Also in civil code of Iran, it is possible to refer to the trade usage as applicable law and agreed by the parties to a contract. This statement could be a legal base for resorting to trade usage as the law governing the dispute by courts. Iranian Commercial code, in many cases, is demonstrating the commercial trade usages.In this study, while reviewing the content and characteristics of trade usage, the legal bases for acceptance and enforcement of them and the judicial approach towards this issues will be examined.