33 CFR Part 157: US Tank Vessel Oil Rules
33 CFR Part 157, the US Coast Guard rules for tank vessels carrying oil in bulk: SBT, crude oil washing in subpart D, discharge limits and foreign COW manuals.
33 CFR Part 157 is the United States Coast Guard regulation on the protection of the marine environment relating to tank vessels carrying oil in bulk. It gives effect in US law to the MARPOL Annex I construction and operating rules for oil tankers, and in places goes further than the IMO text.
The full article will cover the vessel scope in 157.10 and its June 1982 definitions, the discharge rule in 157.37, the crude oil washing requirements in subpart D (157.100 to 157.172), including the numerical tank rule in 157.160 and the COW manual requirement for foreign tankers in 157.118, and how the part interacts with the IMO baseline. Operational practice is covered in crude oil washing and tank cleaning .