Mich. Comp. Laws § 691.1734

Sec. 4. An operator shall do both of the following: (a) Deliver instructions concerning trampoline court rules to trampoliners before they participate in the trampoline court. The instructions may be delivered to trampoliners using video, audio, or computer-based programs, a prerecorded spiel, a written document, signage, verbal instruction, or other delivery method approved by the operator. (b) Convey to trampoliners the substance of the trampoliner responsibility requirements under section 5.