The Coast Guard is proposing to align the Liquid Chemical Categorization tables with the 2020 Edition of the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk and the International Maritime Organization's Marine Environment Protection Committee's Circular 25. The updated tables would provide a list of the liquid hazardous materials and liquefied and compressed gases approved for international and domestic maritime transportation, and indicate how each substance is categorized by its pollution potential, safe carriage requirements, chemical flammability, combustibility, and compatibility with other substances. This proposed rule would impose no additional costs to chemical shippers or vessel owners. Comments and related material must be received by the Coast Guard on or before 21 December 2022. POC is Dr. Raghunath Halder, U.S. Coast Guard Hazardous Materials Division (CG-ENG-5); tel 202-372-1422, email Raghunath.Halder@uscg.mil. (Federal Register 22 September 2022 [Proposed Rule] Pages 57984-58018).