750 ILCS 46/607: No limitation; child having no presumed, acknowledged, or adjudicated parent.

A proceeding to adjudicate the parentage of a child having no presumed, acknowledged, or adjudicated parent may be commenced at any time, even after:

(a) the child becomes an adult, but only if the child initiates the proceeding; or

(b) an earlier proceeding to adjudicate parentage has been dismissed based on the application of a statute of limitations then in effect.