"During the seventy-year period of the existence of the United Nations Security Council, and especially since the 1990s, its roles and competences have evolved significantly, resulting in the creation of peace operations and international tribunals, amongst other innovations. Another relevant function has been the creation of new obligations, either for a limited time and for specific situations, or in general terms and on a permanent basis. This phenomenon has also occurred regarding the law of the sea. In the former situation (a limited time and for specific situations), the legal regime to be applied at sea may be the lex specialis, which derogates the law of the sea applicable in ordinary circumstances (the lex generalis of the sea). The goal of the research is to study and explain what that lex specialis is, and accordingly, how the regulation of the oceans and the conduct of those involved in this sector may be affected.