605 ILCS 5/6-115: (a) Except as provided in Section 10-20 of the Township Code or subsections (b) and (c), no person shall be eligible to the office of highway commissioner or clerk unless he shall be a legal voter and has been one year a resident of the district. In road districts that elect a clerk, the same limitation shall apply to the district clerk.

(b) A board of trustees in a county organized under Division 2-1 of the Counties Code may (i) elect or appoint a non-resident or a resident that has not resided in the district for one year to be a highway commissioner or clerk, or (ii) contract with a neighboring township or road district to provide highway commissioner or clerk services if:

(1) the district is within a township with no incorporated town;

(2) the township has a population of less than 1,000; and

(3) no qualified candidate who has resided in the township for at least one year is willing to serve as highway commissioner or clerk.

(c) A county organized under Division 2-4 of the Counties Code with a road district may (i) elect or appoint a non-resident or a resident who has not resided in the district for one year to be a highway commissioner or clerk, or (ii) contract with a neighboring township or road district to provide highway commissioner or clerk services if no qualified candidate is willing to serve as highway commissioner or clerk.