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					Originally Posted by WestMichBlue
					
				 
				Steve - why is this not a substitution? Both ASA and NFHS books use the words substitute and substitution and substituted for when describing the DP replacing the FLEX or the FLEX replacing the DP. And if they do not do it right, it is an illegal substitution with appropriate penalties. 
  
WMB 
			
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 Speaking ASA
 
It is not a substitution because that would be someone not presently in the game entering a spot into the line up.  In both cases noted, no one has "entered" the game.