{"data":{"id":"us/33-cfr-157.228","jurisdiction":"us","citation":"33 CFR 157.228","heading":"Isolating Valves: Closed during a voyage.","body":"(a) The master of each U.S. tank vessel under § 157.10a(b), § 157.10a(c)(2), § 157.10b(a)(2), or § 157.10c(c)(2) shall ensure that the valves under § 157.222(d) remain closed during each voyage.\n(b) The master of each foreign tank vessel meeting § 157.10a(b), § 157.10a(c)(2), § 157.10b(a)(2), or § 157.10c(c)(2) shall ensure that the valves under § 157.222(d) remain closed when the vessel is on a voyage in the navigable waters of the United States.","path":["Title 33—Navigation and Navigable Waters","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER O—POLLUTION","PART 157—RULES FOR THE PROTECTION OF THE MARINE ENVIRONMENT RELATING TO TANK VESSELS CARRYING OIL IN BULK","Subpart E—Dedicated Clean Ballast Tanks on Tank Vessels"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-33.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:35Z","sha256":"68e771830be9a1502087c3bf3766022afafc513af206b1df6a5fc0d272c523eb","source_id":"us-cfr","stale":true,"prev":"us/33-cfr-157.226","next":"us/33-cfr-157.300"},"notice":"GroundRules: Original legal text. Not legal advice."}