46 C.F.R. § 98.33-11 Smoking.
Title 46 - Shipping
No person may smoke when— (a) Within 50 feet of a portable tank containing a combustible liquid; and (b) On the deck where the tank is stowed.
Title 46: Shipping
PART 98—SPECIAL CONSTRUCTION, ARRANGEMENT, AND OTHER PROVISIONS FOR CERTAIN DANGEROUS CARGOES IN BULK
Subpart 98.33—Portable Tanks for Certain Grade E Combustible Liquids and Other Regulated Materials
§ 98.33-11 Smoking.