65 ILCS 5/5-3-11
In any city or village adopting the managerial form of municipal government, if such city or village has heretofore adopted Division 2 of Article 9, the council or village board shall by ordinance provide that the board of local improvements be composed of not less than 3 nor more than 5 members appointed by the mayor or president of the municipality with the consent of the council or village board. The board shall have all powers conferred and all duties imposed by Division 2 of Article 9. Such members may be appointed from persons holding other offices or positions in the government of the city or village. If provision is otherwise made for such functions, it shall not be necessary that any city or village operating under this Article 5 have the offices of commissioner of public works, superintendent of streets, superintendent of special assessments, superintendent of sewers, city engineer, public engineer or chief clerk of special assessments.
65 ILCS 5/5-3-11