310 ILCS 5/22
The Illinois Housing Development Authority shall have general supervision of all housing corporations and shall have power to investigate into the affairs of such corporations, and into the dealings, transactions and relationships of such corporations with third persons. Any investigation provided for by this act may be conducted by the Illinois Housing Development Authority, or, on the direction of the Illinois Housing Development Authority, by any member, officer or employee thereof. The Illinois Housing Development Authority, and any member, officer or employee thereof so designated, shall have power to administer oaths, to take affidavits, to subpoena and require the attendance of witnesses and the production of books and papers of such corporations or third persons pertaining to the investigations authorized by this act, and to examine such witnesses, books and papers in relation to any matter which the Illinois Housing Development Authority has the power to investigate; to issue commissions for the examination of witnesses who are without the state, or are unable to attend before the Illinois Housing Development Authority or are excused from attendance.
All hearings conducted by the Illinois Housing Development Authority shall be open to the public, and all evidence presented at hearings held by the Illinois Housing Development Authority or under its authority shall become a part of the records of the Illinois Housing Development Authority. In cases in which the Illinois Housing Development Authority bases any actions on reports of investigations or inquiries not conducted at hearings, such reports shall be made a part of the records of the Illinois Housing Development Authority.
Each member, and each officer and employee of the Illinois Housing Development Authority authorized thereby, shall have the power to examine all books, contracts, records, documents and papers of a housing corporation and by subpoena duces tecum compel the production thereof.
The Illinois Housing Development Authority shall have power to adopt reasonable and proper rules and regulations relating to the exercise of its powers and proper rules to govern its proceedings and to regulate the mode and manner of all investigations, and hearings and to alter and amend the same.
310 ILCS 5/22