The Rules of Substitution :
• There is no limit to the number of players who may be substituted at the same time nor to the number of times any player may substitute or be substituted.
• The substitution of a player may be made only after a player from the same team has left the field.
• Time shall not be stopped for substitutions except for goalkeepers.
• Substitutes shall not be permitted for suspended players during their suspension.
• After completing a suspension, a player may be substituted without first returning to the field.
• Players leaving or entering the field shall do so at the center-line or such other place on the side of the field decided by the umpires before the game.
