"coastal wetland"

means—

(a)any wetland in the coastal zone; and
(b)includes—
(i)land adjacent to coastal waters that is regularly or periodically inundated by water, salt marshes, mangrove areas, inter-tidal sand and mud flats, marshes, and minor coastal streams regardless of whether they are of a saline, freshwater or brackish nature; and
(ii)the water, the subsoil and substrata beneath, and bed and banks of, any such wetland;