(b) Except as provided in section 1602(a) of the Panama Canal Act of 1979 (
22 U.S.C.
3792 (a)), a vessel measured under this chapter may not be required to be measured under another law.
(c) Unless otherwise provided by law, the measurement of a vessel under this chapter applies to a law of the United States whose applicability depends on a vessels tonnage, if that law
(1) becomes effective after July 18, 1994; or
(2) is in effect before July 19, 1994, is not enumerated in section
14305 of this title, and is identified by the Secretary by regulation as a law to which this chapter applies.