Periods of PlayThe match lasts two equal periods of 45 minutes (Youth games are adjusted according to age), unless otherwise mutually agreed between the referee and the two participating teams. Any agreements to change the periods of play must be made before the start of play and must comply with the competition rules. Half-Time IntervalPlayers are entitled to an interval at half-time. The half-time interval must not exceed 15 minutes (in youth games 5-10 minutes is the normal break). The duration of half-time may only be altered by the referee. Allowance for Time Losthe Referee may impose an allowance in either period for time lost to reasonably assure that both halves are equal with respect to actual playing time. Time may be added on for slow substitution(s), time used for the assessment of injury to players and the removal of injured players from the field of play for treatment, any time wasting, or any other cause. The allowance for time lost is at the discretion of the referee.Penalty KickIf a penalty kick has to be taken or retaken, the duration of either half is extended until the kick is completed.Extra Time (Overtime)Competition rules may provide for two further equal periods to be played. The conditions of Law 8 will apply.