Smityukh A. UNIDROIT Principles of International Commercial Contracts and lex mercatoria in the light of the International Private Law.

In the thesis the “narrow” conception of lex mercatoria is proved as based on the practice of international trade a-national system of rules of contract law, created by international commercial community to provide sufficient regulation for international commercial transaction by autonomous or subsidiary applying. The Principles UNIDROIT content, underlying ideas, foreign judicial practice, prospect of applying in the light of new Civil Code of Ukraine are analyzed. UNIDROIT Principles are regarded as a paramount, system-making part of lex mercatoria. In the thesis is based advisability of further research of lex mercatoria in context not only of the international but also of the international private law.