70 ILCS 2805/91
The costs and expenses of maintaining the committee of local improvements, for paying salaries of the members of the committee, and the expense of making and levying special assessments or special taxes and of letting and executing contracts and also the entire cost and expense attending the making and return of the assessment rolls and the necessary estimates, examinations, advertisements and like matters connected with the proceedings provided for in this Act, including the court costs and the fees to commissioners in condemnation proceedings, which are to be taxed as provided in this Act, shall be paid by the district out of its general corporate fund, provided that any district may, in the ordinance providing for the prescribed assessment, provide that a certain sum, not to exceed 6% of the amount of this assessment, shall be applied toward the payment of the specified and other costs of making and collecting this assessment. The estimate of cost of the improvement may also provide an item setting forth a reserve for deficiency in interest not to exceed 6% of the amount of the assessment.
The limitation in the preceding paragraph shall not apply to the costs of engineering and inspection connected with any local improvement, but these costs may be included in the cost of the improvement to be defrayed by special assessment or special tax.
70 ILCS 2805/91