Section 7149 - Hoistmen Required to be on Duty(a) A qualified hoistman shall be in immediate charge of the hoist at all times when men are being hoisted or lowered. Should any of the hoistman's duties be delegated to a learner, they shall be performed under the direct personal supervision of the qualified hoistman.
(b) At all times the shift is being hoisted or lowered, a man who is familiar with the operation of the hoist shall be present beside the hoistman, and be on the alert to assume immediate control of the hoist in the event that the hoistman should become incapacitated. The standby man need not be a fully qualified hoistman, but shall be familiar with the operation of the hoist.
This subsection does not apply where the hoist is equipped with control devices that will automatically stop the hoist and apply the brake when the shaft conveyance reaches designated points at the top and bottom of the shaft.
(c) (19-55) A hoistman shall be on duty, within hearing of the hoist signal, as long as any man remains in a mine into which he has been lowered. He shall not at any time be more than 300 feet from his hoist.(d) The hoistman shall not be permitted to engage in conversation while hoisting or lowering men.Cal. Code Regs. Tit. 8, § 7149