When must be a soccer match replayed and in which number of law or rule of soccer are these conditions stated?
USSF answer (January 26, 2009):
The match must be replayed when the rules of the competition call for it. There is nothing in the Laws of the Game regarding the matter.
However, there is a requirement in the Law that, unless superseded by the rules of competition, a match cannot be considered complete if it fails to proceed through the full length of the required periods of play (2 equal periods of 45 minutes each). So, if a game is ended before this point, it cannot be considered a valid match in the absence of any pertinent provision in the rules of competition. Those provisions can range from the circumstances under which the the match COULD be counted anyway to rules about replaying the match.