Cal. Code Regs. tit. 8, § 7011 – Parts of Shovels, Draglines, and Hoisting Equipment Subject to Wear.

(a) The employer shall require that wire ropes, bearings, friction clutches, chain drives, and other parts subject to wear be inspected at adequate intervals in order that any unsafe conditions may be corrected.
(b) The division may require properly dated detailed reports of such inspections to be made in places of employment where there is doubt as to proper supervision over safe maintenance of hoisting equipment.
(c) The intervals between the inspections shall be short enough to enable the employer to be reasonably certain that the crane, hoist, derrick, excavating or loading equipment will not be operated when in an unsafe condition.
(d) (9-3) Mechanically or electrically operated brakes shall be inspected periodically, and necessary repairs and adjustments shall be made.