Ill. Admin. Code tit. 80, § 2210.220
a) Except as limited in this Section, the following categories of individuals are eligible to be covered as Dependents under the Program:
1) A Member’s spouse
3) A Member’s child from birth to age 26. For purposes of this Section, a child includes:
4) A Member’s child over the age of 26 who meets one of the following conditions: