(a) If the Administrator determines that revenue derived from a PFC is excessive or is not being used as approved, the Administrator may reduce the amount of funds otherwise payable to the public agency under 49 U.S.C. 47114. Such a reduction may be made as a corrective action under § 158.83 or § 158.85 of this part.

(b) The amount of the reduction under paragraph (a) of this section shall equal the excess collected, or the amount not used in accordance with this part.

(c) A reduction under paragraph (a) of this section shall not constitute a withholding of approval of a grant application or the payment of funds under an approved grant within the meaning of 49 U.S.C. 47111(d).