42 C.F.R. § 137.261 Does the Secretary have the authority to immediately reassume a PSFA?
Title 42 - Public Health
Yes, the Secretary may immediately reassume operation of a program, service, function, or activity (or portion thereof) and associated funding upon providing to the Self-Governance Tribe written notice in which the Secretary makes a finding: (a) of imminent substantial and irreparable endangerment of the public health caused by an act or omission of the Indian Tribe; and (b) the endangerment arises out of a failure to carry out the compact or funding agreement.
Title 42: Public Health
PART 137—TRIBAL SELF-GOVERNANCE
Subpart M—Reassumption
§ 137.261 Does the Secretary have the authority to immediately reassume a PSFA?

