Mich. Comp. Laws § 408.341

Sec. 21. (1) A skier shall conduct himself or herself within the limits of his or her individual ability and shall not act or ski in a manner that may contribute to his or her injury or to the injury of any other person. A skier shall be the sole judge of his or her ability to negotiate a track, trail, or slope. (2) While in a ski area, a skier or passenger shall not do any of the following: (a) Board a ski lift which has been designated as closed. (b) Wilfully board or embark upon, or disembark from, a ski lift, except at an area designated for those purposes. (c) Intentionally drop, throw, or expel an object from a ski lift while riding on the lift. (d) Do any act which interferes with the running or operation of a ski lift, such as, but not limited to: swinging or bouncing on an aerial lift, attempting to contact supporting towers, machinery, guides, or guards while riding on a ski lift; or skiing out of the designated ski track on a surface lift or tow. (e) Use a ski lift, unless the skier or passenger has the ability to use the lift safely without instruction on use of the lift by a ski area owner, manager, operator, or employee, or unless the skier or passenger requests and receives instruction before entering the boarding area of the ski lift. (f) Use a ski lift or ski without properly engaging and using ski restraining devices, brakes, or restraining straps.