{"operation":"document","citation":"49 CFR 172.521","title":"DANGEROUS 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 DANGEROUS placard must be as follows:\n\n(b) In addition to meeting the requirements of § 172.519, and appendix B to this part, the DANGEROUS placard must have a red upper and lower triangle. The placard center area and 1/2-inch (12.7 mm.) border must be white. The i","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-172-521.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-172-521.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-172-521","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-172.521","body":"(a) Except for size and color, the DANGEROUS placard must be as follows:\n\n(b) In addition to meeting the requirements of § 172.519, and appendix B to this part, the DANGEROUS placard must have a red upper and lower triangle. The placard center area and 1/2-inch (12.7 mm.) border must be white. The inscription must be black with the 1/8-inch (3.2 mm.) border marker in the white area at each end of the inscription red.\n\n[Amdt. 172-29, 41 FR 15996, Apr. 15, 1976, as amended by Amdt. 172-29A, 41 FR 40680, Sept. 20, 1976]","truncated":false,"body_characters":522}