42 CFR 430.104 - Decisions that affect FFP.
(a)Scope of decisions. If the Administrator concludes that withholding of FFP is necessary because a State is out of compliance with Federal requirements, in accordance with § 430.35, the decision also specifies -
(2) The effective date of the decision to withhold.
(c)Effective date of decision. The effective date of a decision to withhold Federal funds will not be earlier than the date of the Administrator's decision and will not be later than the first day of the next calendar quarter. The provisions of this section may not be waived under § 430.64.