If a permanent employee accepts a nonpermanent appointment during a trial service period and the employer has agreed to return the employee to a position at the conclusion of the nonpermanent appointment, the employer may:

(1) Suspend the trial service period and allow the employee to resume the trial service period when the employee returns from the nonpermanent appointment;

(2) Require the trial service period to start over when the employee returns from the nonpermanent appointment; or

(3) Count the time worked in the nonpermanent appointment towards the trial service period.