Subjects of International Law

Abstract

The Court should now mention the principle of respect for State sovereignty, which in international law is of course closely linked with the principles of the prohibition of the use of force and of non-intervention. The basic legal concept of State sovereignty in customary international law, expressed in, inter alla, Article 2, paragraph 1, of the United Nations Charter, extends to the internal waters and territorial sea of every State and to the air space above its territory. As to superjacent air space, the 1944 Chicago Convention on Civil Aviation (Art. 1) reproduces the established principle of the complete and exclusive sovereignty of a State over the air space above its territory. That convention, in conjunction with the 1958 Geneva Convention on the Territorial Sea, further specifies that the sovereignty of the coastal State extends to the territorial sea and to the air space above it, as does the United Nations Convention on the Law of the Sea adopted on 10 December 1982. The Court has no doubt that these prescriptions of treaty-law merely respond to firmly established and longstanding tenets of customary international law.

Military and Paramilitary Activities (Nicaragua/United States of America) Merits. 1.27.6.1986 I.C.I.Reports 1986, p. 14