National Futsal Championship Rules - Players are encouraged to be registered within the appropriate age range. The organising committee will not allow. Singapore Youth Olympic Festival 1. FUTSAL. COMPETITION RULES & REGULATIONS. (Updated on 22 January ). 1. Rules. According to the. Laws of the Game. The field of play; The ball; The number of players; The players' equipment; The referee; The other match officials; The duration of the match.