46 USC 14305 - Optional regulatory measurement
(a) On request of the owner of a documented vessel measured under this chapter, the Secretary also shall measure the vessel under chapter 145 of this title. The tonnages determined under that chapter shall be used in applying
(1) parts A, B, C, E, F, and G of this subtitle and section 12116 of this title;
(5) section 30506 of this title;
(10) the Officers Competency Certificates Convention, 1936, and sections 8303 and 8304 of this title;
(11) the International Convention for the Safety of Life at Sea as provided by IMCO Resolution A.494 (XII) of November 19, 1981;
(12) the International Convention on Standards of Training, Certification, and Watchkeeping for Seafarers, 1978, as provided by IMO Resolution A.540 (XIII) of November 17, 1983;
(13) the International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978 Relating to the International Convention for the Prevention of Pollution from Ships, 1973, as provided by IMO Resolution A.541 (XIII) of November 17, 1983;
(14) provisions of law establishing the threshold tonnage levels at which evidence of financial responsibility must be demonstrated; or
(b) As long as the owner of a vessel has a request in effect under subsection (a) of this section, the tonnages determined under that request shall be used in applying the other provisions of law described in subsection (a) to that vessel.