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25 CFR §900.143

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The Secretary shall approve or deny a waiver within 90 days after the Secretary receives a written waiver request. The Secretary's decision shall be in writing. If the requested waiver is denied, the Secretary shall include in the decision a full explanation of the basis for the decision.