[Code of Federal Regulations] [Title 49, Volume 2] [Revised as of October 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR172.548] [Page 408-409] TITLE 49--TRANSPORTATION CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 172_HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, AND Subpart F_Placarding Sec. 172.548 DANGEROUS WHEN WET placard. (a) Except for size and color, the DANGEROUS WHEN WET placard must be as follows: [GRAPHIC] [TIFF OMITTED] TC02MR91.053 (b) In addition to complying with Sec. 172.519, the background color on the DANGEROUS WHEN WET placard must be blue. The letters in the words [[Page 409]] ``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]