40 ILCS 5/7-160

Child annuities shall be payable to each child of an employee annuitant who dies with no surviving spouse and whose spouse would have been eligible to receive a surviving spouse annuity, and each child of a deceased employee whose surviving spouse dies and whose spouse, immediately prior to death, was receiving or would have been eligible to receive, a surviving spouse annuity, or who left no surviving spouse, is eligible to receive a child annuity, provided: a. The child is less than age 18 and unmarried; b. The child is the natural born or legally adopted child of the employee and was born prior to the date of the employee's latest resignation or discharge from the service of the participating municipality; c. (Blank).