(a) The presiding official at a hearing held under this part and the deciding official under § 98.9 of this part (hereinafter referred to as the "examiner") shall be designated by the Secretary.(b) The examiner shall not have been involved in any of the events specified in the allegations, shall not have been involved in the investigation of the allegations and the institution of the proceedings under this part, and shall not be or have been employed by the administration, or the Office of the Secretary if applicable, in which the alleged violation occurred.