15.1.2.

The act of shooting:

• Begins when the player starts the continuous movement normally preceding the release of the ball and, in the judgement of an official, he has started an attempt to score by throwing, tapping or dunking the ball towards the opponents' basket.
  
• Ends when the ball has left the player’s hand(s) and, in the case of an airborne shooter, both feet have returned to the floor.