23 CAR § 400-209. Platform rigging

(a) If a wire rope bridle is used to connect the platform to the load line, each bridle leg shall be connected to a master link or shackle to ensure that the load is evenly divided among the bridle legs. (b) Hooks on overhaul ball assemblies, lower load blocks, or other attachment assemblies shall be of a type that can be closed and locked, eliminating the hook throat opening, except that an alloy anchor type shackle with a bolt, nut, and retaining pin may be used. (c)(1) Wire rope, shackles, rings, master links, and other rigging hardware shall be capable of supporting at least five (5) times the maximum intended load applied or transmitted to that component. (2) Where rotation resistant rope is used, the rope and hardware shall be capable of supporting without failure at least ten (10) times the maximum intended load. (d) All eyes in the wire rope slings shall be fabricated with thimbles. (e) Bridles and associated rigging for attaching the platform to the hoist line shall be used only for that purpose.