"Long Jump" on a Throw In?

[Freddy]

Thrower-inner A1 backs up and, running toward the endline, jumps across the endline over the court and releases a throw-in pass prior to landing on the floor inbounds.

On a designated spot throw-in the illegality of this "long jumper" seems clear because of 7-6-3 ("...shall not leave the designated throw-in spot until the ball has been released on a throw-in pass") and 4-42-6 NOTE ("...must keep one foot on or over the spot until the ball is released). The throw-in spot exists only in out of bounds area, according to 4-42-2 ("...a method of putting the ball in play from out of bounds").

QUESTION: What rulebook citation, if any, exists that prohibits "long jumper" A1 from doing this on a throw-in after a made or awarded basket, when the designated throw-in spot is not relevant?