<Li> acting on the advice of the assistant referees regarding incidents that he has not seen; </Li> <Li> ensuring that no unauthorised persons enter the field of play; </Li> <Li> indicating the restart of the match after it has been stopped; </Li> <Li> providing the appropriate authorities with a match report, which includes information on any disciplinary action taken against players or team officials, substitutions and any other incidents that occurred before, during or after the match . </Li>

When did football players begin wearing numbers on their shirts