rolling subs
2. There is no compulsion to have 5 replacements and sides do not have to have equal numbers of replacements.
3. Replacements will be made, with the referees permission, at stoppages of play other than at penalty and free kick situations, to make sure that a replacement doesn't come on to the field of play simply to take a kick at goal and then be replaced again.
4. The requirement to have one replacement front row player within the squad is still necessary, so that at the first time of asking a side can replace a front row player in order that the game carries on with contested scrums.
5. This rule is not intended to encourage clubs to pick the maximum number of replacements for league games to the detriment of turning out a second or third XV.
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