Section 820 ILCS 151/20 - Effect On Existing Employee Benefits(a) Taking family military leave under this Act shall not result in the loss of any employee benefit accrued before the date on which the leave commenced. (b) Nothing in this Act shall be construed to affect an employer's obligation to comply with any collective bargaining agreement or employee benefit plan that provides greater leave rights to employees than the rights provided under this Act. (c) The family military leave rights provided under this Act shall not be diminished by any collective bargaining agreement or employee benefit plan. (d) Nothing in this Act shall be construed to affect or diminish the contract rights or seniority status of any other employee of any employer covered under this Act.Added by P.A. 094-0589, § 20, eff. 8/15/2005.