As an act creating rights and duties, legal act is one of the fundamental notions in all legal branches. Legal act is faced with further complications in international law, since it covers whole activities of international organizations and as a tool for announcing of will of states. In view of an internationalist and according to many rules and principles such as jus cogens, good faith and estoppel, legal acts include bilateral and multilateral conventions, resolutions and decisions of international organizations and etc. The legal acts obligate the concerned states and organizations.
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