StacksVerified U.S. regulatory reference

30 CFR §57.14207

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Mobile equipment shall not be left unattended unless the controls are placed in the park position and the parking brake, if provided, is set. When parked on a grade, the wheels or tracks of mobile equipment shall be either chocked or turned into a bank or rib.