(a) Request for review. (1) Any person aggrieved or adversely affected by a denial of a request for any interpretation under § 2901.4 may request a review of the denial by the Secretary, within 30 days from the date of the denial.

(2) Any person aggrieved or adversely affected by a denial of a request for a modification or rescission under § 2901.5, may request a review of the denial by the Secretary within 30 days from the date of the denial.

(3) Any person aggrieved or adversely affected by a denial of a request for an exception or an exemption under § 2901.6, may request a review of the denial by the Secretary within 30 days from the date of the denial.

(b) Procedures. Any request for review under § 2901.7(a) shall be in writing and shall set forth the specific ground upon which the request is based. There is no final agency action for purposes of judicial review under § 2901.8 until that request has been acted upon. If the request for review has not been acted upon within 30 days after it is received, the request shall be deemed to have been denied. That denial shall then constitute final agency action for the purpose of judicial review under § 2901.8.