Link to an amendment published at 90 FR 2431, Jan. 10, 2025.

This amendment was delayed until March 21, 2025, at 90 FR 9222, Feb. 10, 2025.

This amendment was further delayed until May 5, 2025, at 90 FR 12461, Mar. 18, 2025.

This amendment was further delayed to June 4, 2025, at 90 FR 18927, May 5, 2025.

This amendment was further delayed until July 21, 2025, at 90 FR 24231, June 9, 2025.

43 CFR 4.21(a) applies to determinations of the Office of Surface Mining under 30 U.S.C. 1272(e).