Blcoking foul

[BktBallRef]

Verticality applies to a legal position. The basic components of the principle of verticality are:
Legal guarding position must be obtained initially and movement thereafter must be legal.
From this position, the defender may rise or jump vertically and occupy the space within his/her vertical plane.
The hands and arms of the defender may be raised within his/her vertical plane while on the floor or in the air.