[Pantherdreams]

Here are the appropriate fiba rules:


33.3 Legal guarding position
A defensive player has established an initial legal guarding position when:
 He is facing his opponent, and
 He has both feet on the floor.
The legal guarding position extends vertically above him (cylinder) from the floor to the ceiling. He may raise his arms and hands above his head or jump vertically but he must maintain them in a vertical position inside the imaginary cylinder.


33.6 A player who is in the air
A player who has jumped into the air from a place on the playing court has the right to land again at the same place.
He has the right to land on another place on the playing court provided that the landing place and the direct path between the take-off and landing place is not already occupied by an opponent(s) at the time of take-off.
If a player has taken off and landed but his momentum causes him to contact an opponent who has taken a legal guarding position beyond the landing place, the jumper is responsible for the contact.
An opponent may not move into the path of a player after that player has jumped into the air. Moving under a player who is in the air and causing contact is usually an unsportsmanlike foul and in certain circumstances may be a disqualifying foul.


33.8 Charging
Charging is illegal personal contact, with or without the ball, by pushing or moving into an opponent’s torso.