49 C.F.R. § 176.92 Cylinders laden in vehicles.
Title 49 - Transportation
Any cylinder of Class 2 (compressed gas) material which is required to have a valve protection cap fitted in place may be transported on board a ferry vessel without having the valve protection cap in place when it is laden in a transport vehicle and is not removed from the vehicle while on the vessel. [Amdt. 176–1, 41 FR 16110, Apr. 15, 1976, as amended by Amdt. 176–30, 55 FR 52695, Dec. 21, 1990]
Title 49: Transportation
PART 176—CARRIAGE BY VESSEL
Subpart E—Special Requirements for Transport Vehicles Loaded With Hazardous Materials and Transported on Board Ferry Vessels
§ 176.92 Cylinders laden in vehicles.