(a) To certify that the tank complies with all specification requirements, each tank shall be plainly and permanently stamped in letters and figures at least \3/8\ inch high into the metal near the center of both outside heads as follows: ------------------------------------------------------------------------
Example of required stamping------------------------------------------------------------------------Specification............................. DOT-111AMaterial.................................. ASTM A 516-GR 70Cladding material (if any)................ ASTM A240-304 CladTank builder's initials................... ABCDate of original test..................... 00-0000Car assembler (if other than tank builder) DEF------------------------------------------------------------------------
(b) On Class DOT-111 tank cars, the last numeral of the specification number may be omitted from the stamping; for example, DOT-111A100W.
(c) After July 25, 2012, newly constructed DOT tank cars must have their DOT specification and other required information stamped plainly and permanently on stainless steel identification plates in conformance with the applicable requirements prescribed in Sec. 179.24(a). Tank cars built before July 25, 2012, may have the identification plates instead of or in addition to the head stamping. [29 FR 18995, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 179-10, 36 FR 21351, Nov. 6, 1971; Amdt. 179-52, 61 FR 28680, June 5, 1996; 68 FR 48571, Aug. 14, 2003; 77 FR 37985, June 25, 2012]