The unification of legal rules of the international trade has been achieved by different means. The academics and the concerned people have been very actives in introducing some legal and practical propositions to unify the rule of international trade. The different proposition of the academics transferred to became international or regional treaties, international customs and practices and / or model contracts issued by international organizations (such as the Unified Rule for Documentary Credit that were issued by International Chamber of Commerce and the Joint "Venture" model agreement the was issued by (UNCITRA).