Virginia Code Title 45.2. Mines, Minerals, and Energy § 45.2-706. Employment of authorized persons

No miner shall be placed in charge of a cutting, loading, drilling, continuous miner, or timbering machine in any mine if such miner is not an authorized person capable of determining the safety of the roof and ribs of a working place. Such miner shall also be capable of detecting the presence of explosive gas and shall undergo examination by a mine inspector or other instructor certified by the Board of Coal Mining Examiners and authorized by the Chief to determine the miner's fitness to detect explosive gas before being permitted to have charge of a machine in such mine.