Section 157.220 - Dedicated clean ballast tanks: Standards(a) Cargo tanks that are designated as dedicated clean ballast tanks must allow the tank vessel to meet the draft and trim requirements under §§ 157.10a(d) and 157.10b(b) .(b) Each tank under paragraph (a) of this section must be:(2) Any other tank that is accepted by the Commandant.CGD 77-058b, 45 FR 43714, June 30, 1980, as amended by CGD 79-152, 45 FR 82250, Dec. 15, 1980