50 ILCS 122/15
An employee of a local agency who is a certified disaster service volunteer of the American Red Cross or assigned to the Illinois Emergency Management Agency in accordance with the Illinois Emergency Management Agency Act, the Emergency Management Assistance Compact Act, or other applicable administrative rules may be granted leave from his or her work with pay for not more than 20 working days in any 12-month period to participate in specialized disaster relief services for the American Red Cross or for the Illinois Emergency Management Agency, as the case may be, upon the request of the American Red Cross or the Illinois Emergency Management Agency for the services of that employee and upon the approval of that employee's agency, without loss of seniority, pay, vacation time, compensatory time, personal days, sick time, or earned overtime accumulation. The agency must compensate an employee granted leave under this Section at his or her regular rate of pay for those regular work hours during which the employee is absent from work. Leave under this Act shall not be unreasonably denied for services related to a disaster within the United States or its territories.
50 ILCS 122/15