How much can ball handler use his arm?

[potato]

So meaning A1 has the right to defend his verticality with his body/arm,

what if:

A1 did not extend his arms into B1's vertical however pushed B1's extended arm away (within A1's verticality) and makes B1 fall down or cause B1 to be displaced while on air?

A1 initiate contacts with B1's extended arm within A1's verticality, would B1 be called for a defensive foul? For example B1 extended his arm towards A1 A1 raises arm to block B1 continues pressing his arm towards A1's blocking hand.

Originally Posted by JetMetFan

If you put your hands/arms into an opponent's vertical space, the onus is on you if there's contact. So for your second example, if B1 is playing defense with his/her arms reaching towards A1 and A1 moves his/her arms into B1's arms there really can't be a foul called on A1 (assuming A1 doesn't karate chop B1 or something like that).

[bob jenkins]

Originally Posted by potato

So meaning A1 has the right to defend his verticality with his body/arm,

what if:

A1 did not extend his arms into B1's vertical however pushed B1's extended arm away (within A1's verticality) and makes B1 fall down or cause B1 to be displaced while on air?

A1 initiate contacts with B1's extended arm within A1's verticality, would B1 be called for a defensive foul? For example B1 extended his arm towards A1 A1 raises arm to block B1 continues pressing his arm towards A1's blocking hand.

As I'm seeing these plays in my mind, both are either fouls on A or no calls.

[Camron Rust]

Originally Posted by potato

So meaning A1 has the right to defend his verticality with his body/arm,

what if:

A1 did not extend his arms into B1's vertical however pushed B1's extended arm away (within A1's verticality) and makes B1 fall down or cause B1 to be displaced while on air?

A1 initiate contacts with B1's extended arm within A1's verticality, would B1 be called for a defensive foul? For example B1 extended his arm towards A1 A1 raises arm to block B1 continues pressing his arm towards A1's blocking hand.

If A1 is using their arm to push B1's arm out of the way, then verticality doesn't come into play. There is never a case where a player is permitted to use their arm to push any part of another player.