Section 55(1)(i) in Himachal Pradesh Minor Minerals (Concession) and Minerals (Prevention of Illegal Mining, Transportation and Storage) Rules, 2015
(i)a whole-time Mining Engineer or the person possessing 2nd Class Mine Manager's Certificate of Competency issued by the Director General of Mines Safety, where mining operations are carried out by deployment of heavy mining machinery for deep hole drilling, excavation, loading and transport, or where the average employment exceeds one hundred per day or in case area of quarry is 50 hectare or more;