Quote: FSW "
(h) having retired the distance prescribed in the preceding paragraph no player of the team not in possession may advance until the ball has cleared the ruck. A player who is out of play may again take part in the game when the advantage gained by not retiring has been lost.
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I know you've got that from the link Spook posted, but that looks like the "Modified Rules" for U12's and under. I'm sure the international rules (which is the default away from any modified rules) says that they cant advance until the ball is played by the tackled attacker