251. The braking devices and clutch of a drum hoist shall be interlocked mechanically such that it is impossible to unclutch a drum unless the brakes of the drum are applied and kept on until the clutch of the drum is fully engaged. They shall also have a locking mechanism preventing the disengagement of any clutch from starting until the braking devices have been applied on both drums.
O.C. 213-93, s. 251; O.C. 465-2002, s. 21.