Michigan Compiled Laws, Chapter 445. Trade and Commerce § 445.1722

(a) “Emergency personnel” means police, fire, or other appropriate emergency medical personnel.

(b) “Operator” means a person or entity who owns or controls or who has operational responsibility for a roller skating center.

(c) “Roller skater” means a person wearing roller skates while that person is in a roller skating center for the purpose of roller skating.

(d) “Roller skating center” means a building, facility, or premises which provides an area specifically designed to be used for roller skating by the public.

(e) “Spectator” means a person who is present in a roller skating center only for the purpose of observing skating activity, whether recreational or competitive.