(a) The Administrator shall evaluate any application submitted under § 67.12 and shall:

(1) Approve the program and delegate authority to the State to administer the program if he determines that the requirements of § 67.11 have been and will be met; or

(2) Request additional information if he determines that the information submitted is not sufficient to allow him to determine whether the requirements of § 67.11 have been and will be met; or

(3) Disapprove the State program if he determines that the information submitted establishes that the requirements of § 67.11 have not been or will not be met.

(b) The Administrator shall notify the State in writing of his action under paragraph (a) of this section and shall state the reasons for his action.

(c) In all cases of delegation (whether or not express provision is made in the notice of delegation) the Administrator shall retain continuing authority to issue notices of noncompliance, review exemption requests or penalty calculations, or take any other steps set forth in part 66 to assess and collect these penalties. Such authority shall be exercised pursuant to the provisions of § 67.21.

(d) The Administrator shall retain exclusive authority to assess and collect penalties against source owners or operators of facilities in the State who were issued notices of noncompliance pursuant to part 66 prior to the effective date of the delegation, except to the extent the Administrator specifically delegates such authority to the State.