49 C.F.R. § 397.15 Fueling.
Title 49 - Transportation
When a motor vehicle which contains hazardous materials is being fueled— (a) Its engine must not be operating; and (b) A person must be in control of the fueling process at the point where the fuel tank is filled.
Title 49: Transportation
PART 397—TRANSPORTATION OF HAZARDOUS MATERIALS; DRIVING AND PARKING RULES
Subpart A—General
§ 397.15 Fueling.
