An employee hired to work temporarily should be enrolled in IMRF unless the period of time the person will work will be less than 600 hours. If a temporary employee is hired to fill in for an indeterminate length of time, that employee should be enrolled in IMRF.
Employees hired on a probationary basis must be enrolled in IMRF as of the first day on the job if the position for which the person is hired will require more than 600 hours in the next 12 months. Probationary policies exempting employees from participation in IMRF for specified periods of time are not allowed by the Pension Code and are not recognized by IMRF.