[tjones1]

Originally Posted by bbcof83

The way I understand it is a player is allowed to dive for a ball, gain possession and slide as far as his momentum takes him. Once he stops he mustn't change his plane and can dribble, pass, shoot or call request TO.

To your question about getting to his knees, that would be a violation. The pivot is the point that is in contact with the floor (when sitting, the rear end). When pivot is changed (to a foot when attempting to stand) a violation has occurred.

I also understand this to be true: A player on the ground violates if he moves so that the plane of his body that is in contact with the floor changes (ie, roll from back to side, roll from front to side, roll from side to back, etc). So no rolling around, basically.