The increase in sea traffic with commercial ships, warships, and submarines, followed by the spread of pollution of the seas in the last century, has not only led to the threat and destruction of vital resources and marine habitats but also a source of tension and conflict between units and actors. It has provided political and can be a threat to the world community. Despite Legal requirements, pollution in the seas is increasing. The sovereignty-oriented nature of marine pollution legal requirements is one of the most important reasons for governments' reluctance to implement regulations related to marine pollution because the development of rules in this field, as well as the implementation of regulations related to marine pollution, are still within the scope of governments' satisfaction. Considering the importance of protecting the marine environment, this research deals with the scope of the coastal government's competence to deal with marine pollution using a descriptive-analytical method and with the help of library data and international documents. The findings of the research show that although the instrumental use of the concept of national sovereignty has created the basis for the pollution of the seas, Recent developments in the field of international law of the sea, such as the drafting of Article 3 of the Convention on Interference in the High Seas and paragraph one of Article 218 of the Convention on the Law of the Sea, indicate the extraterritorial expansion of the jurisdiction of coastal states to deal with marine pollution, although in a limited way.
