Relating to diesel-powered equipment regulations in underground coal mines

HB 3331 updates West Virginia's rules for diesel-powered equipment in underground coal mines. It gives the state's Director of Miners' Health, Safety, and Training authority to create regulations that align with federal MSHA standards, without being stricter than those federal rules. The bill eliminates the need for site-specific testing of equipment already approved under federal standards and establishes a process for mine operators to request alternative technologies or exemptions. Each request must be reviewed on a mine-by-mine basis to ensure miner safety isn't compromised, with decisions made within 180 days of application.