Players wear sport shoes without studs, however, on grass or other soft services, sport shoes without rubber ridged soles are authorized. It is forbidden to use any substances or material on the hands, or any 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 three people, of whom one is responsible for the scoring and timekeeping. The referees control the game according to the rules and the scorer notes the results, foul play, and that substitutions are correctly made. Normally referees will control a match, taking 'leading and trailing' responsibilities according to the direction of the play.
Referees change ends after each period.
In the case of different interpretations between two referees who have blown their whistles for the same incident, the view of the referee with 'leading' responsibility in that part of the playing area nearest the point at which the incident occurred, shall take precedence. Where different interpretations persist the 'leading' referee's decision is final and every effort is made to resolve differences in the intervals between play. Back to top 5. The length of the men's matches shall be 3 periods of 15 minutes, with a maximum interval of five minutes between periods. The length of the women's and junior matches shall be 3 periods of 12 minutes, with a maximum interval of 5 minutes between periods.