“ Precedence among those officers designated in paragraph (a) of this section who have the same date of appointment shall be determined by the Secretary of the Navy at the time that such appointments are made.
(d) Notwithstanding paragraph (a) and (b) of this section, an officer shall not act for or exercise the powers of the Secretary of the Navy under this order if that officer serves only in an acting capacity in the position that would otherwise entitle him to do so. ”