The Director shall provide an informal hearing if requested by the applicant. Within 30 days of the receipt of the applicant's request for reconsideration or of the applicant's hearing, if any, whichever is later, the Director shall affirm, reverse, or modify the Regional Director's determination. Written notice of the Director's decision and the reasons therefor shall be provided promptly to the applicant. The Director's decision shall constitute the final administrative decision of the Secretary in the matter. Nothing in this part shall be construed to deprive the Secretary or the Assistant Secretary for Fish and Wildlife and Parks of the authority to take jurisdiction at any stage of any appeal or request for reconsideration and render the final decision in the matter after holding any informal hearing that may be required, to review any decision of the Regional Director or Director, or to direct the Regional Director or Director to reconsider a decision.
50 C.F.R. §37.22