The dedicated clean ballast tanks or equipment on a tank vessel that has a letter issued under Sec. 157.204 may not be altered so that they no longer meet the plans accepted under that section unless:
(a) The owner or operator of that vessel submits plans that show the alterations to the Coast Guard official to which the plans were submitted under Sec. 157.200 or Sec. 157.202;
(b) The owner or operator of that vessel submits changes to the manual under Sec. 157.224 that show and describe the alterations to the Coast Guard official to which the manuals were submitted under Sec. 157.206 or Sec. 157.208; and
(c) The Coast Guard issues to the tank vessel an amending letter stating that the vessel, as altered, complies with this subpart.
Design and Equipment