{"operation":"document","citation":"49 CFR 173.53","title":"Provisions for using old classifications of explosives.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"Where the classification system in effect prior to January 1, 1991, is referenced in State or local laws, ordinances or regulations not pertaining to the transportation of hazardous materials, the following table may be used to compare old and new hazard class names:\n\nCurrent classification Class na","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-173-53.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-173-53.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-173-53","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-173.53","body":"Where the classification system in effect prior to January 1, 1991, is referenced in State or local laws, ordinances or regulations not pertaining to the transportation of hazardous materials, the following table may be used to compare old and new hazard class names:\n\nCurrent classification Class name prior to Jan. 1, 1991 Division 1.1 Class A explosives. Division 1.2 Class A or Class B explosives. Division 1 3 Class B explosive. Division 1.4 Class C explosives. Division 1.5 Blasting agents. Division 1.6 No applicable hazard class.","truncated":false,"body_characters":537}