Skip to main content
  • News Story

PHMSA Releases Final Rule HM-215O

Highway and blurred lights.

May 21, 2020

PHMSA finally published HM-215O as a Final Rule on Monday May 11, 2020. It is effective as of that date (with one exception for instruction 17 – the Lithium Battery Test Summary which is effective January 2, 2023) but is not mandatory until May 10, 2021. Its major purpose is to update the Hazardous Materials Regulations (HMR) to newer versions of the international transport regulations and references.


Regulation/Reference Updates

Regulation or Reference Revision Incorporated by Final Rule Most Current Revision Available
ICAO 2019-2020 2019-2020
IMDG Amendment 39-18 (2018) Amendment 39-18 (2018)
UN Model Regulations 20th (2017) 21st (2019)
UN GHS 7th (2017) 8th (2019)
UN MTC (Manual of Tests and Criteria) 6th, Amendment 1 (2017) 7th (2019)
TDG (Canada) SOR/2016-95, SOR/2017-137, SOR/2017-253 SOR/2019-75, SOR/2019-101
OECD Corrosivity Test Guidelines 404, 430, 431, 435 2015 2015

It also adds or updates several ISO standards relating to gas cylinders, and the International Atomic

Energy Agency Code of Conduct on the Safety and Security of Radioactive Sources.

Additional information detailing more specific impacts of this Final Rule will be available in a follow-up article.


Final Rule:


Get connected with our sales team

Thanks for your interest in our products and services. Let's collect some information so we can connect you with the right person.

Please wait…