{"operation":"document","citation":"49 CFR 178.337","title":"Specification MC 331; cargo tank motor vehicle primarily for transportation of compressed gases as defined in subpart G of part 173 of this subchapter.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-178-337.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-178-337.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-178-337","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-178.337","body":"","truncated":false,"body_characters":0}