157.218—Dedicated clean ballast tanks: Alterations.
The dedicated clean ballast tanks or equipment on a tank vessel that has a letter issued under § 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 § 157.200 or § 157.202 ;
(b)
The owner or operator of that vessel submits changes to the manual under § 157.224 that show and describe the alterations to the Coast Guard official to which the manuals were submitted under § 157.206 or § 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.