UPDATE: PHMSA issues Final Rule to Amend HMR to Align with International Regulations and Standards UPDATE: PHMSA issues Final Rule to Amend HMR to Align with International Regulations and Standards PHMSA Final Rule Amendment - March 30, 2017 Logan / Monday, April 10, 2017 0 9694 Article rating: 4.5 PHMSA issued a Final rule to amend the HMR to maintain consistency with IMDG, ICAO, and UN TDG Model Regulation. Read more