Section 7(2)(b) in The Minerals (Evidence of Mineral Contents) Rules, 2015
(b)at least a Pre-Feasibility Study (F2) report has been prepared to establish Probable Mineral Reserve (121 and 122) conforming to Part V of the Schedule, to plan mining operation for a period of five years from the date of commencement of mining lease and such report has been submitted to the State Government.