[Code of Federal Regulations] [Title 36, Volume 1] [Revised as of July 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 36CFR9.12] [Page 168] TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY CHAPTER I--NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR PART 9_MINERALS MANAGEMENT--Table of Contents Subpart A_Mining and Mining Claims Sec. 9.12 Supplementation or revision of plan of operations. (a) An approved plan of operations may require reasonable revision or supplementation to adjust the plan to changed conditions or to correct oversights. (1) The Regional Director may initiate an alteration by notifying the operator in writing of the proposed alteration and the justification therefor. The operator shall have thirty (30) days to comment on the proposal. (2) The operator may initiate an alteration by submitting to the Superintendent a written statement of the proposal, and the justification therefor. (b) Any proposal initiated under paragraph (a) of this section by either party shall be reviewed and decided by the Regional Director in accordance with Sec. 9.10. Where the operator believes he has been aggrieved by a decision under this paragraph, he may appeal the decision pursuant to Sec. 9.14.