Pipeline and Haz. Matls. Safety Admin., DOT Section 172.544 FLAMMABLE GAS placard must be red. The symbol, text, class number and inner border must be white. [Amdt. 172-123, 56 FR 66262, Dec. 20, 1991] Section 172.536 [Reserved] Section 172.540 POISON GAS placard. (a) Except for size and color, the POISON GAS placard must be as follows: (b) In addition to complying with Section 172.519, the background on the POISON GAS 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 (25-8 inches) above the horizontal center line. The text, class number, and inner border must be black. (b) In addition to complying with Section 172.519, the background color on the FLAMMABLE placard must be red. The symbol, text, class number and inner border must be white. (c) The word - GASOLINE - may be used in place of the word - FLAMMABLE - on a placard that is displayed on a cargo tank or a portable tank being used to transport gasoline by highway. The word - GASOLINE - must be shown in white. [Amdt. 172-123, 56 FR 66262, Dec. 20, 1991] Section 172.544 COMBUSTIBLE placard. (a) Except for size and color, the COMBUSTIBLE placard must be as follows: [62 FR 39408, July 22, 1997] Section 172.542 FLAMMABLE placard. 435 VerDate Sep<11>2014 16:41 Oct 31, 2018 Jkt 244226 PO 00000 Frm 00445 Fmt 8010 Sfmt 8010 Q:\49\49V2.TXT PC31 ER22JY97.024 (b) In addition to complying with Section 172.519, the background color on the COMBUSTIBLE placard must be red. EC02MR91.049 EC02MR91.050 (a) Except for size and color, the FLAMMABLE placard must be as follows: