70 ILCS 1865/21
All funds deposited by the treasurer in any bank or savings and loan association shall be placed in the name of the District and shall be withdrawn or paid out only by check or draft upon the bank or savings and loan association, signed by the general manager (executive director) of the District if not more than $5,000 or by any 2 of the following persons if $5,000 or more: the treasurer, the general manager (executive director) of the District, and the chairman of the Board.
No bank or savings and loan association shall receive public funds as permitted by this Section, unless it has complied with the requirements established pursuant to Section 6 of "An Act relating to certain investments of public funds by public agencies", approved July 23, 1943, as now or hereafter amended.
70 ILCS 1865/21