25 C.F.R. § 900.21 When can a proposal be declined?
Title 25 - Indians
As explained in §§900.16 and 900.17, a proposal can only be declined within 90 days after the Secretary receives the proposal, unless that period is extended with the voluntary and express written consent of the Indian tribe or tribal organization.
Title 25: Indians
PART 900—CONTRACTS UNDER THE INDIAN SELF-DETERMINATION AND EDUCATION ASSISTANCE ACT
Subpart E—Declination Procedures
§ 900.21 When can a proposal be declined?