Law 7 – The Duration of The Match
Allowance for Time Lost
 
  • removal of injured players from the field of play for treatment;

  • wasting time;

  • any other cause.

  • The allowance for time lost is at the discretion of the referee.
Penalty Kick
 
  • If a penalty kick has to be taken or retaken, the duration of either half is extended until the penalty kick is completed.
Abandoned Match
 
  • An abandoned match is replayed unless the competition rules provide otherwise.
more on The Duration of The Match