For purposes of this Section, "employee" includes a former employee, and "child" means the issue of an employee or a child adopted by an employee.
Payments shall cease when a child attains the age of 18 years (age of 23 years in the case of a full-time student) or marries, whichever first occurs. The annuity shall not be payable unless the employee has been employed as an employee for at least 36 months from the date of the employee's original entry into service (at least 24 months in the case of an employee who first entered service before June 13, 1997) and at least 12 months from the date of the employee's latest re-entry into service; provided, however, that if death arises out of and in the course of service to the employer and is compensable under either the Illinois Workers' Compensation Act or Illinois Workers' Occupational Diseases Act, the annuity is payable regardless of the employee's length of service.
40 ILCS 5/13-308