49 C.F.R. § 172.548 DANGEROUS WHEN WET placard.
Title 49 - Transportation
(a) Except for size and color, the DANGEROUS WHEN WET placard must be as follows: (b) In addition to complying with §172.519, the background color on the DANGEROUS WHEN WET placard must be blue. The letters in the words “WHEN WET” must be at least 25 mm (1.0 inches) high. The symbol, text, class number and inner border must be white. [Amdt. 172–123, 56 FR 66263, Dec. 20, 1991]
Title 49: Transportation
PART 172—HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, AND TRAINING REQUIREMENTS
Subpart F—Placarding
§ 172.548 DANGEROUS WHEN WET placard.
