(a) General rule.--Containers for the transport of diesel fuel shall meet the requirements of this section.

(b) Limitations on containers.--Diesel fuel shall be transported only in containers specifically designed for the transport of diesel fuel.

(c) Limitations on vehicle transport.--No more than one safety can, conspicuously marked, shall be transported on a vehicle at any time.

(d) Standards for containers other than safety containers.--Containers, other than safety cans, used to transport diesel fuel shall be provided with the following:

(e) Tanks with manual gauging.--When tanks are provided with openings for manual gauging, liquid-tight caps or covers shall be provided and shall be kept closed when not open for gauging.

(f) Capacity of containers.--Containers used for the transport of diesel fuel shall not exceed a capacity of 500 gallons.

(g) Certain containers as permanent fixtures.--Containers, other than safety cans, used for the transport of diesel fuel shall be permanently fixed to the transportation unit.

(h) Method of transportation.--Diesel fuel transportation units shall be transported individually and not with any other cars, except that two diesel fuel transportation units up to a maximum of 500 gallons each may be transported together.

(i) Prohibition.--Diesel fuel shall not be transported on conveyor belts.

(j) Fire extinguisher.--When transporting diesel fuel in containers other than safety cans, a fire extinguisher shall be provided on each end of the transportation unit. The fire extinguishers shall be multipurpose type dry-chemical fire extinguishers containing a nominal weight of 20 pounds.

(k) Fire suppression systems for diesel transportation units.--Diesel fuel transportation units shall have a fire suppression system that meets the requirements of section 408.¹

(l) Limitations where trolley wires are present.--In mines where trolley wire is used, diesel fuel transportation units shall be provided with insulating material to protect the units from any energized trolley wire and the distance between the diesel fuel transportation unit and the trolley wire shall not be less than 12 inches or the trolley wire shall be de-energized when diesel fuel transportation units are transported through the area.

(m) Parking restrictions.--Unattended diesel fuel transportation units shall be parked only in underground diesel fuel storage facilities.

(n) Emergency fueling restrictions.--Safety cans shall be used for emergency fueling only.

(o) Standards for safety cans.--Safety cans shall be clearly marked, have a maximum capacity of five gallons, be constructed of metal and be equipped with a nozzle and self-closing valves.