33 C.F.R. § 151.29 Foreign ships.
Title 33 - Navigation and Navigable Waters
(a) Each oil tanker of 150 gross tons and above and each other ship of 400 gross tons and above, operated under the authority of a country other than the United States that is party to MARPOL 73/78, shall, while in the navigable waters of the United States or while at a port or terminal under the jurisdiction of the United States, carry on board a shipboard oil pollution emergency plan approved by its flag state. (b) Each oil tanker of 150 gross tons and above and each other ship of 400 gross tons and above, operated under the authority of a country that is not a party to MARPOL 73/78, must comply with §151.21 of this subpart while in the navigable waters of the United States. [CGD 93–030, 59 FR 51342, Oct. 7, 1994]
Title 33: Navigation and Navigable Waters
PART 151—VESSELS CARRYING OIL, NOXIOUS LIQUID SUBSTANCES, GARBAGE, MUNICIPAL OR COMMERCIAL WASTE, AND BALLAST WATER
Subpart A—Implementation of MARPOL 73/78 and the Protocol on Environmental Protection to the Antarctic Treaty as it Pertains to Pollution from Ships
Oil Pollution
§ 151.29 Foreign ships.

