Wyo. Stat. § 27-1-103: Safety devices on elevators and machinery.

The openings of all hoistways, hatchways, elevators, well holes and stairways in manufacturing establishments, mills, workshops, bakeries, laundries, stores, hotels, theaters, halls, or any other kind of establishment where labor is employed, or machinery used, shall be protected by trapdoors, hatches, fences, automatic gates or other safeguards, and all due diligence shall be used to keep all such means of protection closed, except when it is necessary to have the same open for use when practicable. All machinery, in use in any mercantile, manufacturing, or any other establishment whatsoever where labor is employed, shall be equipped, with proper shifters for throwing on or off pulleys, loose pulleys and other such safeguards as may be deemed necessary by the department of workforce services for the proper safeguard of life and limb.