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PHMSA is considering amendments that would enhance safety and revise and clarify the Hazardous Materials Regulations (HMR) applicable to the transportation of hazardous materials by air. Specifically, this would propose revisions to the notification of the pilot-in-command (NOTOC) requirements to harmonize with international regulations. The current requirements for NOTOC as contained in 49 CFR 175.33 are not fully harmonized with the ICAO Technical Instructions for the Safe Transport of Dangerous Goods by Air (2013-2014 Edition). The ICAO TI contains specific requirements for the air operator to provide a copy of the NOTOC to the flight dispatcher, and for the air operator to obtain and retain a confirmation that the NOTOC was received and agreed to by the pilot. These provisions do not appear in the HMR, even though they have been deemed critical requirements by the International Civil Aviation Organizations Dangerous Goods Panel (ICAO DGP) and the National Transportation Safety Board (NTSB).