40 CFR § 60.726
Delegation of authority
June 9, 2020
(a) In delegating implementation and enforcement authority to a State under section 111(c) of the Act, the authorities contained in paragraph (b) of this section shall be retained by the Administrator and not transferred to a State.
(b) Authorities which will not be delegated to the States:
[53 FR 2676, Jan. 29, 1988, as amended at 53 FR 19300, May 27, 1988]