70 ILCS 935/40
Before holding any public hearing prescribed in Section 35 of this Act, or any meeting regarding the passage of any resolution to file a lawsuit, the Commission shall give notice to the grantee or lessee, or his or her legal representatives, successors, or assigns, of the time and place of the proceeding. The notice shall be accompanied by a statement signed by the secretary of the Commission, or by any person authorized by the Commission to sign the same, setting forth any act or things done or omitted to be done in violation, or claimed to be in violation, of any restriction as to the use of the property, whether the restriction is prescribed in any of the terms of this Act or by any restriction as to the use of the property determined by the Commission under the terms of this Act. The notice of the time and place fixed for the proceeding shall also be given to any person or persons as the Commission shall deem necessary. The notice may be given by registered mail, addressed to the grantee, lessee, or legal representatives, successors, or assigns, at the last known address of the grantee, lessee, or legal representatives, successors, or assigns.
70 ILCS 935/40