{"data":{"id":"us/49-cfr-179.300-4","jurisdiction":"us","citation":"49 CFR 179.300-4","heading":"-4 Insulation.","body":"(a) Tanks shall not be insulated.\n(b) [Reserved]","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 179—SPECIFICATIONS FOR TANK CARS","Subpart E—Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW)"],"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":"34b24ae12059c98bef25b052db974d217a073bac354e0d8d5f01de1ceffb41d3","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-179.300-3","next":"us/49-cfr-179.300-6"},"notice":"GroundRules: Original legal text. Not legal advice."}