33 CFR § 157.310 - Exempted vessels: operations.

---
identifier: "/us/cfr/t33/s157.310"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 157.310 - Exempted vessels: operations."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "157.310"
section_name: "Exempted vessels: operations."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "O"
subchapter_name: "POLLUTION"
part_number: "157"
part_name: "RULES FOR THE PROTECTION OF THE MARINE ENVIRONMENT RELATING TO TANK VESSELS CARRYING OIL IN BULK"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1903; 46 U.S.C. 3703, 3703a (note); Department of Homeland Security Delegation No. 0170.1. Subparts G, H, and I are also issued under section 4115(b), Pub. L. 101-380, 104 Stat. 520; Pub. L. 104-55, 109 Stat. 546."
regulatory_source: "CGD 74-32, 40 FR 48283, Oct. 14, 1975, unless otherwise noted."
cfr_part: "157"
---


# 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:

Exempted under 33 CFR 157.306 from the requirements of (*33 CFR 157.10a or 157.10c, whichever is appropriate, will be inserted*). This vessel may not discharge cargo in any foreign port, nor may it load cargo in a port other than the following: (*a list of ports contained in the application that is accepted by the Coast Guard for the exempted vessel will be inserted here*).

[CGD 79-126, 46 FR 3513, Jan. 15, 1981, as amended by CGD 82-28, 50 FR 11630, Mar. 22, 1985; USCG-2000-7641, 66 FR 55573, Nov. 2, 2001]