The chief of police may designate without examination to serve at the pleasure of the chief of police, subject to the approval of the mayor and board of aldermen, one or more police officers holding rank above and including that of captain to be operations bureau captain and administrative bureau captain. Upon termination of such designation by the chief of police, such person shall return to the rank held by him prior to the designation without loss of any rights and privileges under the merit system, or to such higher grade or position to which the mayor and board of aldermen may appoint him. (Ord. No. G-81-5, § 1, 3-19-81; Ord. No. G-95-31 § 1, 6-15-95)