50 Ill. Adm. Code 4445.120
Basic 415 Limitations
Section 4445.120 Basic 415 Limitations
Notwithstanding any other provisions to the contrary, and
pursuant to 40 ILCS 5/1-116, the member contributions made to, and retirement
benefits paid from, a pension fund shall be limited to such extent as may be
necessary to conform to the requirements of IRC section 415, for a qualified
pension plan.