NFHS 4.7.2c

[Adam]

Originally Posted by JeffM

c. There must be reasonable space between two defensive players or a defensive player and a boundary line to allow the dribbler to continue in his/her path. If there is less than 3 feet of space, the dribbler has the greater responsibility for the contact.

IMO...the rule allows the defenders to move laterally (not hip check) to guard the player. Since it was less than 3 feet, the dribbler has the greater responsibility of the contact and a foul on the dribbler in the OP could be supported by this rule, as long as the hip check was intended to close the gap rather than re-route the dribbler.

But, very few fans and players are aware of this rule. I was not aware of this rule until I became an official. Additionally, 3 feet is pretty wide for a basketball player to go between.

Calling a foul on B would not be questioned.

No where in this rule does it say contact is automatically a foul. The incidental contact rule still applies, and if B1 is not adversely affected by the contact, then by rule you cannot call a foul on A1.