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Title 46

Displaying title 46, up to date as of 7/17/2026. Title 46 was last amended 6/30/2026.
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Title 46ShippingPart / Section
Chapter ICoast Guard, Department of Homeland Security1 – 199
Subchapter OCertain Bulk Dangerous Cargoes150 – 155
Part 153Ships Carrying Bulk Liquid, Liquefied Gas, or Compressed Gas Hazardous Materials153.0 – 153.1608
Subpart COperations153.900 – 153.1504
Documents and Cargo Information153.900 – 153.912
§ 153.900Certificates and authorization to carry a bulk liquid hazardous material.
§ 153.901Documents: Posting, availability, and alteration.
§ 153.902Expiration and invalidation of the Certificate of Compliance.
§ 153.903Operating a United States ship in special areas: Categories A, B, and C.
§ 153.904Limitations in the endorsement.
§ 153.905Regulations required to be on board.
§ 153.907Cargo information.
§ 153.908Cargo viscosity and melting point information; measuring cargo temperature during discharge: Categories A, B, and C.
§ 153.909Completing the Cargo Record Book and record retention: Categories A, B, C, and D.
§ 153.910Cargo piping plan.
§ 153.912Certificate of inhibition or stabilization.
General Cargo Operational Requirements153.920 – 153.923
§ 153.920Cargo quantity limitations.
§ 153.921Explosives.
§ 153.923Inerting systems.
General Vessel Safety153.930 – 153.936
§ 153.930Cargo antidotes.
§ 153.931Obstruction of pumproom ladderways.
§ 153.932Goggles and protective clothing.
§ 153.933Chemical protective clothing.
§ 153.934Entry into spaces containing cargo vapor.
§ 153.935Opening of tanks and cargo sampling.
§ 153.935aStorage of cargo samples.
§ 153.936Illness, alcohol, drugs.
Marking of Cargo Transfer Hose153.940
§ 153.940Standards for marking of cargo hose.
Cargo Transfer Procedures153.953 – 153.983
§ 153.953Signals during cargo transfer.
§ 153.955Warning signs during cargo transfer.
§ 153.957Persons in charge of transferring liquid cargo in bulk or cleaning cargo tanks.
§ 153.959Approval to begin transfer operations required.
§ 153.964Discharge by gas pressurization.
§ 153.966Discharge by liquid displacement.
§ 153.968Cargo transfer conference.
§ 153.970Cargo transfer piping.
§ 153.972Connecting a cargo hose.
§ 153.975Preparation for cargo transfer.
§ 153.976Transfer of packaged cargo or ship's stores.
§ 153.977Supervision of cargo transfer.
§ 153.979Gauging with a sounding tube.
§ 153.980Isolation of automatic closing valves.
§ 153.981Leaving room in tank for cargo expansion.
§ 153.983Termination procedures.
Special Cargo Procedures153.1000 – 153.1065
§ 153.1000Special operating requirements for cargoes reactive with water.
§ 153.1002Special operating requirements for heat sensitive cargoes.
§ 153.1003Prohibited carriage in deck tanks.
§ 153.1004Inhibited and stabilized cargoes.
§ 153.1010Alkylene oxides.
§ 153.1011Changing containment systems and hoses to and from alkylene oxide service.
§ 153.1020Unusually toxic cargoes.
§ 153.1025Motor fuel antiknock compounds.
§ 153.1035Acetone cyanohydrin or lactonitrile solutions.
§ 153.1040Carbon disulfide.
§ 153.1045Inorganic acids.
§ 153.1046Sulfuric acid.
§ 153.1052Carriage of other cargoes in acid tanks.
§ 153.1060Benzene.
§ 153.1065Sodium chlorate solutions.
Approval of Surveyors and Handling of Categories A, B, C, and D Cargo and NLS Residue153.1100 – 153.1132
§ 153.1100Responsibility of the person in charge.
§ 153.1101Procedures for getting a Surveyor: Approval of Surveyors.
§ 153.1102Handling and disposal of NLS residue: Categories A, B, C, and D.
§ 153.1104Draining of cargo hose: Categories A, B, C, and D.
§ 153.1106Cleaning agents.
§ 153.1108Heated prewash for solidifying NLS, high viscosity NLS and required prewashes of NLS whose viscosity exceeds 25 mPa sec at 20 °C: Categories A, B, and C.
§ 153.1112Prewash for tanks containing Category A NLS residue.
§ 153.1114Conditions under which a prewash may be omitted: Categories A, B, and C.
§ 153.1116Prewash for tanks unloaded without following the approved Procedures and Arrangements Manual: Categories B and C.
§ 153.1118Prewash of Categories B and C cargo tanks not meeting stripping standards: Categories B and C.
§ 153.1119When to prewash and discharge NLS residues from a prewash; unloading an NLS cargo in a country whose Administration is not signatory to MARPOL 73/78: Categories A, B, and C.
§ 153.1120Procedures for tank prewash: Categories A, B, and C.
§ 153.1122Discharges of NLS residue from tank washing other than a prewash: Categories A, B, and C.
§ 153.1124Discharges of Category D NLS residue.
§ 153.1126Discharge of NLS residue from a slop tank to the sea: Categories A, B, C, and D.
§ 153.1128Discharge of NLS residue from a cargo tank to the sea: Categories A. B, C, and D.
§ 153.1130Failure of slops discharge recording equipment; operating with, reporting failures, and replacing pollution equipment: Category A, B, C, D.
§ 153.1132Reporting spills and non-complying discharges: Category A, B, C, and D.
Maintenance153.1500 – 153.1504
§ 153.1500Venting system rupture disks.
§ 153.1502Fixed ballast relocation.
§ 153.1504Inspection of personnel emergency and safety equipment.