46 CFR § 182.540
Ballast systems
April 15, 2021
(a) Ballast piping must not be installed in any compartment integral with the hull of a wooden vessel. Where the carriage of liquid ballast in such a vessel is necessary, suitable ballast tanks, structurally independent of the hull, must be provided.
(b) Solid and water ballast must comply with the requirements of part 178 of this subchapter.