{"data":{"id":"us/49-cfr-172.503","jurisdiction":"us","citation":"49 CFR 172.503","heading":"Identification number display on placards.","body":"For procedures and limitations pertaining to the display of identification numbers on placards, see § 172.334.","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":"f900d14cb671c0a10a096c8983c664dac04ec021a40dbdefb0579d7dad8bfbcc","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-172.502","next":"us/49-cfr-172.504"},"notice":"GroundRules: Original legal text. Not legal advice."}