Ill. Admin. Code tit. 95 § 118.10
Resident. Residency as defined by the Illinois Supreme Court shall govern this ACT as follows: "Residency ordinarily means that a person has his home in a particular place. This involves the question of intent with which he is staying in that place. If a person goes to a place with the intention of remaining for a limited time, although in point of fact he may remain for a year or more, still does not constitute him a resident. It is his intent accompanied by his acts, and not the lapse of time, which determines whether he is a resident of the particular place. The word "resident" is in common usage and is generally understood to mean one having more than mere physical presence." The factors which determine intent: are a person is employed full time in Illinois; or a person has an Illinois voter's registration card; or a person pays Illinois property and income tax; or a person who holds public office in Illinois; or a person who holds an office in a civic organization in Illinois (e.g. Moose, Jaycees, Elks, Shriners); or the person has no mailing address outside the State of Illinois.
Ill. Admin. Code tit. 95, § 118.10