{"operation":"document","citation":"49 CFR 173.141","title":"Class 9—Assignment of packing group.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"The packing group of a Class 9 material is as indicated in column 5 of the § 172.101 table.","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-173-141.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-173-141.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-173-141","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-173.141","body":"The packing group of a Class 9 material is as indicated in column 5 of the § 172.101 table.","truncated":false,"body_characters":91}