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			Live ball foul for illegal substitution (one of the two instances that you can have live ball illegal substitution if I'm not mistaken).   
 
A good way to remember that this is not encroachment is that he's technically not a "player" until he is on his team's side of the neutral zone.  Thus, it's a live ball illegal substitution.
		 
		
		
		
		
		
		
		
		
	
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