the territorial sea is measured (except as established by a maritime boundary treaty in force or being provisionally applied by the United States or, in the absence of such a treaty, where the distance between the United States and another country is less than 400 nautical miles, a line equidistant between the United States and the other country). (B) Inner boundary Without affecting any Presidential proclamation with regard to the establishment of the United States territorial sea or exclusive economic zone, the inner boundary of the exclusive economic zone is— (i) in the case of the coastal States, a line coterminous with the seaward boundary of each such State, as described in section 4 of the Submerged Lands Act ( 43 U.S.C. 1312 )