(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 shall not be delegated to States:
[54 FR 34031, Aug. 17, 1989, as amended at 55 FR 40178, Oct. 2, 1990]