30 CFR §250.610
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
You must equip diesel engine air intakes with a device to shut down the diesel engine in the event of runaway. Diesel engines that are continuously attended must be equipped with remotely operated, manual, or automatic shutdown devices. Diesel engines that are not continuously attended must be equipped with automatic shutdown devices.