The Pipeline and Hazardous Materials Safety Administration (PHMSA) understands that many offerors and carriers of hazardous materials in international transport will soon be adhering to requirements in the internationally-adopted 2019-2020 International Civil Aviation Organization's Technical Instructions for the Safe Transport of Dangerous Goods by Air (ICAO Technical Instructions) and Amendment 39-18 of the International Maritime Organization, International Maritime Dangerous Goods Code (IMDG Code). PHMSA is giving notice that it will not take enforcement action against any offereror or carrier using these standards when transporting hazardous materials by certain modes. Full details can be found in the related documents section to the right of this page.