Members or Employees of Authority; Conflicting Relations or Interests; Effect. No members or employees of the Authority shall be employed by, be an officer or director of, or have any ownership interest in any corporation or entity which is or is to be a party to a management agreement or assistance agreement with the Authority under this Act or which is a tenant of any facility for which financial assistance is or is to be provided under this Act. No monies of the Authority shall be deposited in any financial institution in which any officer, director or holder of a substantial proprietary interest is also a member or employee of the Authority. No real estate to which a member or employee of the Authority holds legal title or in which such person had any beneficial interest, including any interest in a land trust, shall be purchased by the Authority or by a corporation or entity for a facility to be financed under this Act. All members and employees of the Authority shall file annually with the Authority a record of all real estate in this State to which such person holds legal title or in which such person has any beneficial interest, including any interest in a land trust. In the event it is later disclosed that the Authority has purchased real estate in which a member or employee had an interest, such purchase shall be voidable by the Authority and the member or employee involved shall be disqualified from membership in or employment by the Authority.