With the approval of the Department, an appointing power may shorten the duration of the job examination period only where the appointing power finds that the LEAP candidate has clearly demonstrated he or she can successfully perform all the duties and functions of the position to which he or she has examined. The appointing power shall document the reasons for seeking to shorten the duration of the job examination period in a manner prescribed by the Department. In no event may a LEAP candidate serve less than three quarters of the job examination period.