Section 15(5) in The Mineral Conservation and Development Rules, 2017
(5)In case of a doubt as to the optimum ore or mineral recovery under sub-rule (1) or the method of underground development under sub-rule (2), or size of openings, blocks or pillars under sub-rule (3) or the stoping practices under sub-rule (4), it shall be referred to the Chief Controller of Mines for decision.
