All regular appointments, including promotional appointments shall be for a probationary period of not less than six months as set forth in the personnel rules adopted pursuant to this chapter. The appointing authority may not extend the probationary period under any circumstances. During the probationary period, the employee may be rejected at any time without the right of appeal, hearing or any grievance procedure.
(1966 Code, § 12-10) (Ord. 546, § 1(part))