Regulations last checked for updates: May 24, 2025

Title 10 - Energy last revised: May 20, 2025
Appendix Appendix M2 - Appendix M2—XXX
Link to an amendment published at 90 FR 1284, Jan. 7, 2025. This amendment was delayed until March 21, 2025, at 90 FR 9001, Feb. 5, 2025. This amendment was further delayed until July 7, 2025 at 90 FR 21389, May 20, 2025.

source: 42 FR 27898, June 1, 1977, unless otherwise noted.