70 ILCS 605/4-34

The commissioners of a drainage district are officers of the court and as such shall be under the control of the court. Whenever the commissioners, pursuant to any of the provisions of this Act, file a petition or report with the court and such petition or report is verified by a majority of the commissioners, the matters and things therein contained shall be presumed to be correct, and, when introduced in evidence in any such proceeding, shall make out a prima facie case for the district.