Ill. Admin. Code tit. 56, § 2920.5
a) An individual shall be ineligible for benefits with respect to any week for which the individual receives or is entitled to receive any of the following payments whose aggregate amount is equal to or exceeds such individual's weekly benefit amount:
4) Wages for services performed by an individual for any week of less than full time work except those wages for "services performed by an individual in self-employment" as defined by Section 2920.1.
b) In addition to the ineligibility for benefits imposed by the provisions of subsection (a), an individual shall be ineligible for benefits with respect to any week in which he performs full-time work regardless of whether the amount of wages received during that week equal or exceed the weekly benefit amount because the individual is not unemployed as required by Section 239 of the Act.
Example: An individual receives $137.00 in wages for performing services in full-time work. His weekly benefit amount is $150.00. The individual is ineligible for benefits under subsection (b) even though the wages are less than his weekly benefit amount because such individual is performing full-time work. The individual would also not be eligible for reduced benefits under Sections 2920.10 and 2920.15.
c) An individual shall be ineligible for benefits with respect to any week or weeks for which such individual receives any of the following payments whose aggregate amount is equal to or exceeds his weekly benefit amount. Mere entitlement to such payments shall not render the individual ineligible under this subsection.
1) Disqualifying retirement pay under Section 2920.70.
Example: An individual receives a weekly pension of $200.00, all of which is disqualifying under Section 2920.70. The individual's weekly benefit amount is $130.00. The individual is ineligible to receive benefits under this subsection because the receipt of $200.00 in disqualifying retirement pay exceeds his weekly benefit amount.
d) In addition to the ineligibility for benefits imposed by the provisions of subsections (a), (b), and (c), an individual shall be ineligible for benefits with respect to any week or weeks in which the aggregate amount of any payments treated as wages referred to in subsections (a)(1), (2) and (3), plus any of the disqualifying payments referred to in subsection (c), is equal to or exceeds such individual's weekly benefit amount.