Jump stop vs "up and down"

[bainsey]

I don't know if we have any interpreters on this board, but I posed the OP's question to a long-time IAABO interpreter, and his ruling is a legal jump stop:

"As you are probably aware, a player who ends a dribble by catching the ball with one foot on the floor, may jump off that foot and land simultaneously on both feet. At that point, neither foot may be used as a pivot foot."