A goal is scored when the whole of the ball passes over the goal line, between the goalposts and under the crossbar, provided that no infringement of the Laws of the Game has been committed previously by the team scoring the goal.
Goal scored with an extra person on the field of play 
If, after a goal is scored, the referee realises, before play restarts, that there was an extra person on the field of play when the goal was scored:
the referee must disallow the goal if:
– the extra person was an outside agent and he interfered with play
– the extra person was a player, substitute, substituted player or team official associated with the team that scored the goal
the referee must allow the goal if:
– the extra person was an outside agent who did not interfere with play
– the extra person was a player, substitute, substituted player or team official associated with the team that conceded the goal