The match lasts two equal periods of 45 minutes, unless otherwise mutually agreed between the referee and the two teams. Any agreement to alter the duration of the periods of play (e.g. to reduce each half to 40 minutes because of insufficient light) must be made before the start of play and must comply with competition rules.
Players are entitled to an interval at half-time.
The half-time interval must not exceed 15 minutes.
Competition rules must state the duration of the half-time interval.
The duration of the half-time
interval may be altered only with the consent of the referee
Allowance is made in either period for all time lost through :
If a penalty kick has to be taken or retaken, the duration of either half is extended until the penalty kick is completed.