49 C.F.R. § 179.201-10 Water capacity marking.
Title 49 - Transportation
(a) Water capacity of the tank in pounds stamped plainly and permanently in letters and figures at least water capacity 000000 Pounds (b) [Reserved]
Title 49: Transportation
PART 179—SPECIFICATIONS FOR TANK CARS
Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW and 115AW)
§ 179.201-10 Water capacity marking.