IMRF Disability Leaves, Summer. In an effort to provide employees of the Transportation Department more options to preserve accumulated sick leave and to provide District U-46 with a more stable workforce during the school year, the following program has been agreed to by the combined DUTU Labor Management Committee. This plan allows employees to preserve some or all of their accumulated sick leave when on an IMRF Disability Leave (must be longer than 30 calendar days) while providing employees an incentive to schedule such a leave (such as elective surgery) during non-school times of the year. The combined DUTU Labor Management Committee will monitor the Program and may make modifications as needed. Rules and procedures for IMRF Disability Leaves include, but are not limited to: