49 CFR 172.548 - DANGEROUS WHEN WET placard.
(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 published on 2014-10-01
no entries appear in the Federal Register after this date.