605 ILCS 5/6-116
Except as otherwise provided in this Section with respect to highway commissioners of township and consolidated township road districts, at the election provided by the general election law in 1985 and every 4 years thereafter in all counties, other than counties in which a county unit road district has been established and other than in Cook County, the highway commissioner of each road district and the district clerk of each road district having an elected clerk, shall be elected to hold office for a term of 4 years, and until his successor is elected and qualified. The highway commissioner of each road district and the district clerk of each road district elected in 1979 shall hold office for an additional 2 years and until his successor is elected and has qualified.
In each township and consolidated township road district outside Cook County, highway commissioners shall be elected at the election provided for such commissioners by the general election law in 1981 and every 4 years thereafter to hold office for a term of 4 years and until his successor is elected and qualified. The highway commissioner of each road district in Cook County shall be elected at the election provided for said commissioner by the general election law in 1981 and every 4 years thereafter for a term of 4 years, and until his successor is elected and qualified.
Each highway commissioner shall enter upon the duties of his office on the third Monday in May after his election.
In road districts comprised of a single township, the highway commissioner shall be elected at the election provided for said commissioner by the general election law. All elections as are provided in this Section shall be conducted in accordance with the general election law.
605 ILCS 5/6-116