PHMSA has issued a notice to offerors and carriers of hazardous materials regarding the 2017-2018 ICAO Technical Instructions for the Safe Transport of Dangerous Goods by Air and Amendment 38-16 of the IMDG Code.
At this time, PHMSA has not made a final decision on whether or not it will be adopting the recent changes to the international standards. Until a decision has been made offerers and carriers will be permitted to use either the 2015-2016 or 2017-2018 standards for markings and labeling. The FAA, FRA, FMCSA, and PHMSA will be following this enforcement discretion until such time as this notice has been modified or rescinded.
PHMSAs Notice Regarding the IMDG Code and ICAO Technical Instructions