33 CFR § 157.35 - Ballast added to cargo tanks.
---
identifier: "/us/cfr/t33/s157.35"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 157.35 - Ballast added to cargo tanks."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "157.35"
section_name: "Ballast added to cargo tanks."
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: "2026-03-24"
last_updated: "2026-03-24"
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"
---
# 157.35 Ballast added to cargo tanks.
The master of a tank vessel with segregated ballast tanks or dedicated clean ballast tanks under § 157.09, § 157.10, § 157.10a(a)(1), § 157.10a(b), § 157.10a(c), § 157.10b(a), § 157.10c(b)(1), or § 157.10c(c) shall ensure that ballast water is carried in a cargo tank only if—
(a) The vessel encounters abnormally severe weather conditions;
(b) More ballast water than can be carried in segregated ballast tanks or dedicated clean ballast tanks is necessary for the safety of the vessel;
(c) The ballast water is processed and discharged in compliance with § 157.37; and
(d) On a new vessel under § 157.10 that carries crude oil, the ballast water is only carried in a cargo tank that is crude oil washed in accordance with Subpart D of this part during or after the most recent discharge of crude oil from that tank.
[CGD 77-058b, 45 FR 43708, June 30, 1980, as amended by CGD 82-28, 50 FR 11626, Mar. 22, 1985]