Sec. 4. (a) It is the purpose of this article to establish requirements that are not more stringent than the requirements required to meet the Federal Surface Mining Control and Reclamation Act of 1977 (30 U.S.C. 1201 through 1328).
(b) The director and the commission may not adopt a rule under this article that is more stringent than corresponding provisions under the Federal Surface Mining Control and Reclamation Act of 1977 (30 U.S.C. 1201 through 1328).