Players should be dressed uniformly and have a clearly visible number. Players are to wear sports shoes without studs, however, on grass or other soft surfaces, sport shoes with rubber ridges soles are authorised. It is forbidden to use any substances or material on the hands, or other parts of the body, if the former would improve the player's ball handling, especially in the skill of catching. The refereeing body for international matches shall comprise 3 persons, of whom one is to be responsible for the scoring and time-keeping. The referees control the game according to the rules and the scorer notes the results, foul-play and that substitutions are correctly made.
Referees change ends after each period.
The length of the men's match shall be three periods of 15 minutes, with a maximum interval of 5 minutes between periods. The length of the women's and junior matches shall be three periods of 12 minutes, with a maximum interval of 5 minutes between periods. Catch, throw, hit or impel the ball in any way with head, hands, arms or trunk. Make up to three contacts with the feet with the ground whilst in possession of the ball. Receiving the ball with one foot, or two feet on the ground counts as the first contact.