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					Originally Posted by eyezen  A1 inbounding ball on sideline.  B1 right on top of sideline guarding A1's inbound.A1 clears B1 with forearm to get space to inbound the ball.
 Am I correct it would just be a common foul?
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 Rule 7 section 6 Art 3
NOTE: The thrower shall have a minimum of 3 feet horizontally as in 1-2-2. If the court is not marked accordingly, an imaginary restraining line shall be imposed by the administering official. 
the official should have made sure that the player had the required space -  now mind you If the thrower can step backward and attain the space then the official does not have to move the defender off the line.
I would have an intentional personal foul on this,  because if the situation is reversed it is an intentional personal foul.