7. Bed of territorial sea and internal waters vested in
 Crown---Subject to the grant of any estate or interest therein (whether
 by or pursuant to the provisions of any enactment or otherwise, and
 whether made before or after the commencement of this Act), the seabed
 and subsoil of submarine areas bounded on the landward side by the
 low-water mark along the coast of New Zealand (including the coast of
 all islands) and on the seaward side by the outer limits of the
 territorial sea of New Zealand shall be deemed to be and always to have
 been vested in the Crown.