{"operation":"document","citation":"49 CFR 172.544","title":"COMBUSTIBLE placard.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"(a) Except for size and color, the COMBUSTIBLE placard must be as follows:\n\n(b) In addition to complying with § 172.519, the background color on the COMBUSTIBLE placard must be red. The symbol, text, class number and inner border must be white. On a COMBUSTIBLE placard with a white bottom as prescri","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-172-544.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-172-544.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-172-544","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-172.544","body":"(a) Except for size and color, the COMBUSTIBLE placard must be as follows:\n\n(b) In addition to complying with § 172.519, the background color on the COMBUSTIBLE placard must be red. The symbol, text, class number and inner border must be white. On a COMBUSTIBLE placard with a white bottom as prescribed by § 172.332(c)(4), the class number must be red or black.\n\n(c) The words “FUEL OIL” may be used in place of the word “COMBUSTIBLE” on a placard that is displayed on a cargo tank or portable tank being used to transport by highway fuel oil that is not classed as a flammable liquid. The words “FUEL OIL” must be white.\n\n[Amdt. 172-123, 56 FR 66262, Dec. 20, 1991]","truncated":false,"body_characters":667}