30 CFR § 56.19025 - Load end attachments.
(a) Wire rope shall be attached to the load by a method that develops at least 80 percent of the nominal strength of the rope.
(b) Except for terminations where use of other materials is a design feature, zinc (spelter) shall be used for socketing wire ropes. Design feature means either the manufacturer's original design or a design approved by a registered professional engineer.
(c) Load end attachment methods using splices are prohibited.