70 ILCS 2605/5.13

The clerk shall prepare on or before the first (1st) day of July of each year after the year 1943, an annual financial report which shall contain financial information required by generally accepted accounting principles (GAAP) for governments as promulgated and established by the Governmental Accounting Standards Board (GASB).

Copies of the annual financial report shall be made conveniently available in the office of the Sanitary District to the public and shall be issued to any person upon payment of a reasonable amount therefor. Nothing in this section shall be construed to mean that the annual financial report may not be combined with the annual audit report and the two published simultaneously as one report.