33 CFR § 151.61 - Inspection for compliance and enforcement.
While within the navigable waters of the United States or the Exclusive Economic Zone, a ship is subject to inspection by the Coast Guard or other authorized federal agency to determine if—
(a) The ship has been operating in accordance with these regulations and has not discharged plastics or other garbage in violation of the provisions of the Act or Annex V of MARPOL;
(b) Grinders or comminuters used for the discharge of garbage between 3 and 12 nautical miles from nearest land are capable of reducing the size of garbage so that it will pass through a screen with openings no greater than 25 millimeters (one inch);
(c) Information for recordkeeping requirements, when required under § 151.55, is properly and accurately logged;
(d) A garbage management plan, when required under § 151.57, is on board and that the condition of the ship, equipment and operational procedures of the ship meet the plan; and
(e) Placards, when required by § 151.59, are posted on board.