Block, charge, no call travel?

[PG_Ref]

Originally Posted by Adam

According to Nevada, once A1's feet touch the floor, it doesn't matter if B1 got into the spot before A1 went airborne.

Maybe I'm misunderstanding the scenario/play or maybe I didn't explain myself well. If B1 obtained his position after A1 is airborne, and airborne A1 crashes into B1, we have a block. If A1 lands first, then crashes into B1, we have a PC foul (possibly).

4-23
ART. 4

Guarding an opponent with the ball or a stationary opponent *without the ball:

a. No time or distance is required to obtain an initial legal position.

b. If the opponent with the ball is airborne, the guard must have obtained legal position before the opponent left the floor.

ART. 5

Guarding a moving opponent without the ball:

a. Time and distance are factors required to obtain an initial legal position.

b. The guard must give the opponent the time and/or distance to avoid contact.

c. The distance need not be more than two strides.

d. If the opponent is airborne, the guard must have obtained legal position before the opponent left the floor.