This NPRM proposes to revise the Hazardous Materials Regulations (HMR) to remove redundant pages contained in an Appendix that repeats references already listed in U.S. Environmental Protection Agency (EPA) regulations. Comments must be received on or before 2 September 2025. See Federal Register posting for POC information. (Federal Register 1 July 2025 [Proposed Rule] Pages 28544-28548).