CFR 46-154.902-2014 Shipping.PART 154:Safety standards for self-propelled vessels carrying bulk liquefied gases. Section154.902:Atmospheric control within hold and interbarrier spaces.
(a) Vessels certificated to carry flammable cargo in cargo containment systems with full secondary barriers must have an inert gas system or onboard storage of inert gas that provides enough inert gas to meet the requirements of § 154.1848 for 30 days consumption.
CFR 46-154.902-2014 history
2014CFR 46-154.902-2014 Shipping.PART 154:Safety standards for self-propelled vessels carrying bulk liquefied gases. Section154.902:Atmospheric control within hold and interbarrier spaces.