The legislative assumption is that "waters of the sea" lie on both sides of the baseline. The Customs Act 1901 (Cth), s 73(2), prohibits breaking the bulk cargo of an aircraft arriving in or on a flight to Australia while the aircraft is flying over Australia or "in, or flying over, waters of the sea within the outer limits of the territorial sea of Australia". The legislative assumption is that "waters of the sea" are not restricted to the outer limits of the territorial sea. The Historic Shipwrecks Act 1976 (Cth), s 3A(1)(b), refers to removal of part of a ship from "waters of the sea that are within the limits of a State": since waters within the limits of a State are "internal waters", and not part of the territorial sea (The Commonwealth v Yarmirr (2001) 208 CLR 1 at 56-57 [63]; [2001] HCA 56), the legislative assumption is that "waters of the sea" includes waters above the low water mark. See also Defence Act 1903 (Cth), s 51(1) (definitions of "Australian waters" and "internal waters"). In addition to the instances referred to by the appellants, see Control of Naval Waters Act 1918 (Cth), s 2(1) (definitions of "sea" and "waters"); Protection of the Sea (Powers of Intervention) Act 1981 (Cth), s 3(1) (definition of "internal waters"); Admiralty Act 1988 (Cth), s 3(1) (definitions of "inland waters" and "sea"); Offshore Petroleum Act 2006 (Cth), s 326 (definitions of "area to be avoided" and "prescribed safety zone"). The same usage is employed in State legislation, eg Native Vegetation Act 1991 (SA), s 3(1) (definition of "waters of the sea"). ↑