Ill. Admin. Code tit. 62, § 100.70
a) Service to Conform to Law
All service shall conform to all applicable statutes made and provided therefor.
b) Additional Rules as to Service
4) Any pleading, notice, proof of service, or other communication required under these Rules of Procedure to be served upon the Board shall be served at the following address:
Illinois Department of Natural Resources - Mining Board
Office of Mines and Minerals
524 S. Second St.
Springfield, Illinois 62701-1787
c) Proof of Service
Proof of service of any paper shall be by certificate of attorney, affidavit, or acknowledgment.