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			The reason you can't find it is because it is NOT there.  There is no MUST SLIDE
 rule in any baseball I know of.
 
 The way I understand the HS rule is as follows:
 The runner must slide OR avoid the fielder
 on a force play at any base.  If he slides
 directly in a straight line to the base and
 does nothing to alter the play (like pop up
 right away and block the throw) he's OK.
 If he legally slides and contacts the fielder
 (not beyond base) this contact is legal.
 He can't do anything to hinder the fielder's
 attempt to throw for a DP (like slide away from
 the base toward or into the fielder). He must
 slide straight or avoid by veering off away
 from the play. He may not kick his leg up
 into the fielder, or interfere beyond the base.
 A runner may go in standing up if he does not
 contact the fielder or alter the play.
 
 Whether the defense could have completed the
 double play has no bearing on applying this rule.
 
 In such interference, the batter and the
 interfering runner shall be declared out
 and no runners may advance.
 
			
			
			
			
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