33 CFR 157.310 – Exempted vessels: operations
The owner, operator, and master of each vessel that has been granted an exemption under this subpart must ensure that:
(a) The vessel trades only between ports or places within the United States, its territories or possessions;
(b) The vessel loads cargo only at ports or places listed in the exemption;
(c) Except as allowed under § 157.41 (a) and (b) of this part, any ballast water, except segregated ballast discharged in accordance with § 157.43(b) of this part, and any tank washing or oil cargo residues are:
(1) Retained on board; or
(2) Transferred to a shore-based reception facility that is listed in the application for exemption, or in the case of an emergency or a shipyard entry, an alternative acceptable to the cognizant Officer in Charge, Marine Inspection;
(d) The vessel loads only those cargoes listed in the exemption; and
(e) The letter under § 157.306 that grants the exemption is on board the vessel; or
(f) The certificate of inspection bearing the following endorsement is on board the vessel: