{"data":{"id":"us/49-cfr-180.502","jurisdiction":"us","citation":"49 CFR 180.502","heading":"Alternative qualification and maintenance.","body":"Notwithstanding the applicability of § 180.501 for the qualification and maintenance of multi-unit tank car tanks, and subject to conditions and limitations set forth in § 173.252 of this subchapter, the NBIC (IBR, see § 171.7 of this subchapter), must be used for the continuing qualification, maintenance, and periodic testing (i.e., continued service) of Class DOT-106A and 110AW multi-unit tank car tanks constructed to ASME Code Section XII in accordance with § 179.302 of this subchapter.","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 180—CONTINUING QUALIFICATION AND MAINTENANCE OF PACKAGINGS","Subpart F—Qualification and Maintenance of Tank Cars"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-28/title-49.xml","current_through":"2026-10-28","vintage":"","retrieved_at":"2026-10-30T05:55:08Z","sha256":"cafcca2846c6df8f7740c9f00d6d6a5b818ea5dd258d6cac9a03d32df190360e","source_id":"us-cfr","stale":false,"prev":"us/49-cfr-180.501","next":"us/49-cfr-180.503"},"notice":"GroundRules: Original legal text. Not legal advice."}