65 ILCS 5/9-1-1
The provisions of Sections 9-1-2 through 9-1-10 apply in all municipalities unless otherwise provided in any of such sections.
The provisions of Sections 9-1-11 through 9-1-14 are alternative to and not in exclusion of other methods of disposition of undistributed or unclaimed money received from the making of any local improvement paid for wholly or in part by special assessment or special taxation.
Any municipality in making local improvements may use either the procedure set out in Division 2 of this Article or the procedure set out in Division 3 of this Article subject to any restrictions appearing in such divisions. Once a local improvement is begun under one of the procedures it must be completed pursuant to the same procedure.
65 ILCS 5/9-1-1