(a) To the extent necessary, the Secretary shall remeasure a vessel to which this chapter applies if
(1) the Secretary or the owner alleges an error in its measurement; or
(2) the vessel or the use of its space is changed in a way that substantially affects its tonnage.
(b) Except as provided in this chapter or section
14504 of this title, a vessel that has been measured does not have to be remeasured to obtain another document or endorsement under chapter
121 of this title.