Section 70 ILCS 1105/20 - Fiscal year and appropriation ordinances(a) The board shall fix a fiscal year for the district. The board shall, within or before the first quarter of each fiscal year, adopt an annual appropriation ordinance appropriating the sums of money that will be required to defray all necessary expenses and liabilities of the district to be paid or incurred during the fiscal year.(b) The failure of the board to adopt an annual appropriation ordinance or to otherwise comply with the provisions of this Section shall not affect the validity of any tax levy of the district. The annual appropriation ordinance for any fiscal year need not be intended or required to be in support of or in relation to any tax levy made during that fiscal year.(c) A district that determines to change its fiscal year may adopt an appropriation ordinance for a transition period of more or less than 12 months as may be necessary to effect the change. Appropriations made for the transition period shall end with the close of the transition period.