CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER III—FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Parts 300–399) > SUBCHAPTER B—FEDERAL MOTOR CARRIER SAFETY REGULATIONS (Parts 350–399) > PART 397—TRANSPORTATION OF HAZARDOUS MATERIALS; DRIVING AND PARKING RULES > SUBPART A—General (§397.1 to §397.19) > 397.15—Fueling.

397.15—Fueling.

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.