PDFWAC 36-14-200
Duration of rounds.
All professional and amateur events or exhibitions shall meet the following requirements. This includes amateur mixed martial arts sanctioning organizations and training facilities:
(1) A nonchampionship bout shall not exceed three rounds in duration.
(2) A championship bout shall not exceed five rounds in duration.
(3) A round shall not exceed five minutes in duration for professionals and three minutes for amateurs.
(4) There shall be a one minute rest period between rounds.