The Territorial Waters, Continental Shelf, Exclusive Economic Zone and Other Maritime Zones Act,1976
Section 3. Sovereignty over and limits of, territorial waters
(1) The sovereignty of India extends and has always extended to the territorial waters of India (hereinafter referred to as the territorial waters) and to be seabed and subsoil underlying, and the air space over, such waters.
(2) The limit of the territorial waters is the line every point of which is at a distance of twelve nautical miles from the nearest point of the appropriate baseline.
(3) Notwithstanding anything contained in sub-section (2), the Central Government may, whenever it considers necessary so to do having regard to International Law and State practice, alter, by notification in the Official Gazette, the limit of the territorial waters.
(4) No notification shall be issued under sub-section (3) unless resolutions approving the issue of such notification are passed by both Houses of Parliament.