Invoking National Security in International Legal Practice

Since the 1980s, due to the emergence of complex threats and the increasingly intertwined relationship of internal and external issues, the concept of national security has become common in international parlence. In such a situation, the need to address the concept of national security, which became a universal concept, was an essential step from the perspective of international law. The International Court of Justice (ICJ) began the process with three judgments issued in the Nicaragua case in 1986, and the Nuclear Weapons case in 1996, and the Oil Platforms case in 2003, which introduced national security concepts such as "fundamental interests, vital interests, and emergencies" into the international law literature. The first manifestations of this practice appeared in international human rights law and then international  disarmament law in the form of treaty terms. By analyzing the above-mentioned views, practices and sources, this paper will examine the formation of a "national security regime" in international law. A coherent and basic regime of specific rules and norms on national security, which is developing.