46 C.F.R. § 154.1836 Vapor venting as a means of cargo tank pressure and temperature control.
Title 46 - Shipping
When the vessel is on the navigable waters of the United States, the master shall ensure that the cargo pressure and temperature control system under §§154.701 through 154.709 is operating and that venting of cargo is unnecessary to maintain cargo temperature and pressure control, except under emergency conditions.
Title 46: Shipping
PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES
Subpart E—Operations
§ 154.1836 Vapor venting as a means of cargo tank pressure and temperature control.

