(4) For the purpose of implementing any agreement under subsection (1), any settlement pursuant to subsection (2) or any provisional arrangements under subsection (3), the Minister may, from time to time, by order published in the Gazette, declare that the continental shelf or the exclusive economic zone shall not extend to any specified area of the sea, seabed or subsoil that would otherwise be included therein by virtue of section 7 or, as the case may be, section 8, and the order, while it remains in force, shall, subject to section 30, have effect according to its tenor, notwithstanding anything in this Act.