The Central Government may, by notification in the Official Gazette, direct that, subject to such rules as may be made in this behalf, ships belonging to the Government other than ships of the Indian Navy may be registered as Indian ships under this Act and thereupon this Act, subject to any exceptions and modifications which may be made in the notification either generally or with respect to any class of ships belonging to Government, shall apply to ships belonging to Government registered in accordance with those rules as they apply to Indian ships registered in manner provided by this Act.