The declaration under subsection (a) of this section shall apply only to those parts of the areas described in subsection (a) of this section and not described in subsection (b) of this section which are or will be bulkheaded and filled or otherwise occupied by permanent structures or other permanent physical improvements, including marina facilities. All such work is subject to applicable Federal statutes and regulations, including sections
401 and
403 of this title, section
1344 of this title and the National Environmental Policy Act of 1969 [
42 U.S.C.
4321 et seq.].