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• The scrum is to be bound correctly.
• The defending team must be 5 metres behind the last row of forwards and not move forward until it has cleared the scrum.
• If a team is bound and ready to contest a scrum the referee will call time out. The scrum will then be contested when the opposing team is bound.
• With the exception listed below, Interchanges cannot be made after the referee has ordered a scrum. This applies regardless of whether the referee calls time out for an injury or not. The player leaving the field may do so at any time, but the player going on cannot enter the field until the ball emerges from the scrum.
• Interchange at scrums will only be permitted at scrums resulting from a touch line stoppage (i.e. kick finds touch, or player tackled into touch), provided that the interchange player is already with the interchange official waiting to get on when the ball or the player crosses the touch line. Trainers will still be responsible for getting the player being replaced off the field before the interchange player can go on. The referee will not call a time-out or delay the recommencement to allow the interchange to take place.
• The referee will hold the game up to replace a bleeding player, but trainers must first advise the referee that an interchange is going to take place.

Note: To be in play, the ball must emerge from the scrum between and behind the inner feet of the second row forwards.