Revisiting the most important 2019 hazmat regulations—and previewing 2020

The biggest regulatory news in 2019 may have been something that didn’t happen—PHMSA’s HM-215O International Harmonization rule, which would have aligned U.S. regulations with the most recent UN Model Regulations, ICAO Technical Instructions and IMDG Code. HM-215O will almost certainly be formalized in 2020. Meanwhile, here’s a look back at the significant regulatory developments that