605 ILCS 5/6-114
In each road district comprised of a single township, the supervisor of such township shall be ex-officio treasurer for the road district. In each consolidated township road district the treasurer shall be selected by the highway board of auditors of such district from its membership. In each other road district the district clerk shall be ex-officio treasurer for the road district, except as is provided in this Code for county unit road districts and for municipalities that are created a road district.
Each such treasurer before becoming entitled to act as treasurer and within 10 days after his election or selection, shall execute a bond in double the amount of moneys likely to come into his hands by virtue of such office, if individuals act as sureties on such bond, or in the amount only of such moneys if a surety company authorized to do business in this State acts as surety on such bond, conditioned that he will faithfully discharge his duties as such treasurer, that he will honestly and faithfully account for and pay over, upon the proper orders, all moneys coming into his hands as treasurer, and the balance, if any, to his successor in office. Such bond shall be payable to the district, and shall be in such sum as the highway commissioner shall determine. Such bond shall be approved by the highway commissioner and shall be filed in the office of the county clerk with such approval endorsed thereon. The highway commissioner shall have the power to require the giving of additional bond, to increase or decrease the amount of such bond, or require the giving of a new bond whenever in his opinion such action is desirable. The highway commissioner shall have power to bring suit upon such bond for any loss or damage accruing to the district by reason of any non-performance of duty, or defalcation on the part of the treasurer.
605 ILCS 5/6-114