110 ILCS 985/1

When a minor is emancipated and completely self-supporting and actually resides in this State, such minor, while attending any State supported school in this State, shall be considered a resident for the purpose of paying tuition fees, despite a residence outside this State of his parents or guardian. An emancipated minor shall be considered, for the purpose of this Act, to actually reside in this State when he has maintained a dwelling place within this State uninterruptedly for 12 consecutive months immediately prior to his registration in such State supported school, or for such shorter consecutive period of at least 6 months as is designated by the governing board of such State supported school.