50 ILCS 20/11
The Treasurer of a Public Building Commission shall be the legal custodian of all funds derived from the issuance of bonds provided for under this Act and of all revenues derived from the operation of any project under this Act and of all other revenues from whatever source received. The Treasurer shall keep all funds and monies belonging to the Public Building Commission in such places of deposit as may be designated by resolution of the Board of Commissioners, provided, however, that only a savings and loan association or a regularly organized State or national bank may be designated as a depository. When a bank or savings and loan association has been designated as a depository it shall continue as such depository until ten (10) days have elapsed after a new depository is designated and has qualified by furnishing the statements of resources and liabilities as required by this Section. When a new depository is designated, the Board of Commissioners shall notify the surety of the Treasurer of that fact, in writing, at least five (5) days before the transfer of funds. The Treasurer shall be discharged from responsibility for all funds or money which he deposits in a designated bank or savings and loan association while the funds and money are so deposited.
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.
50 ILCS 20/11