33 C.F.R. § 158.110
(a) Subparts B, C, and E apply to each port and each terminal located in the United States or subject to the jurisdiction of the United States that is—
(1) Used by oceangoing tankers, or any other oceangoing ships of 400 gross tons or more, carrying oily mixtures, or by oceangoing ships to transfer NLSs, except those ports and terminals that are used only by—
[CGD 88-002, 54 FR 18407, Apr. 28, 1989, as amended by USCG-2000-7641, 66 FR 55574, Nov. 2, 2001]