{"data":{"id":"us/49-cfr-172.544","jurisdiction":"us","citation":"49 CFR 172.544","heading":"COMBUSTIBLE placard.","body":"(a) Except for size and color, the COMBUSTIBLE placard must be as follows:\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(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.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS","PART 172—HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS","Subpart F—Placarding"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"f836449b3c8b8a9709601bf9e781795cb42e511eaa60baa4588d2bb56ccdea53","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-172.542","next":"us/49-cfr-172.546"},"notice":"GroundRules: Original legal text. Not legal advice."}