49 C.F.R. § 172.555 POISON INHALATION HAZARD placard.
Title 49 - Transportation
(a) Except for size and color, the POISON INHALATION HAZARD placard must be as follows: (b) In addition to complying with §172.519, the background on the POISON INHALATION HAZARD placard and the symbol must be white. The background of the upper diamond must be black and the lower point of the upper diamond must be 65 mm (2 [62 FR 39409, July 22, 1997]
Title 49: Transportation
PART 172—HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, AND TRAINING REQUIREMENTS
Subpart F—Placarding
§ 172.555 POISON INHALATION HAZARD placard.