46 C.F.R. § 111.105-39 Additional requirements for vessels carrying vehicles with fuel in their tanks.
Title 46 - Shipping
Each vessel that carries vehicles with fuel in their tanks must meet the requirements of ABS Rules for Building and Classing Steel Vessels, section 4/5E3, except as follows: (a) If the ventilation requirement of ABS Rules for Building and Classing Steel Vessels, section 4/5E3 is not met, all installed electrical equipment must be suitable for a Class I, Division 1; Zone 0; or Zone 1 hazardous location. (b) If the vessel is fitted with an approved fixed gas detection system set at 25 percent the LEL, each item of the installed electrical equipment must meet the requirements for a Class I, Division 1; Class I, Division 2; Zone 0; Zone 1; or Zone 2 hazardous location. [CGD 94–108, 61 FR 28285, June 4, 1996, as amended at 62 FR 23909, May 1, 1997]
Title 46: Shipping
PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS
Subpart 111.105—Hazardous Locations
§ 111.105-39 Additional requirements for vessels carrying vehicles with fuel in their tanks.

