(a) The total amount of all fees imposed during any fiscal year shall not exceed the statutory maximum imposed by Congress. The Commission shall credit pro-rata any fees collected in excess of this amount against amounts otherwise due.

(b) To the extent that revenue derived from fees imposed under the rates of fees established under § 514.2 are not expended or committed at the close of any fiscal year, such funds shall remain available until expended to defray the costs of operations of the Commission.