The provision that t-shirts may be worn by players under their game uniforms is not valid anymore.
It is legal when a player falls and slides on the floor while holding the ball.
The ball goes to the team’s front-court when, during the dribble from back-court to front-court, both feet of the dribbler and the ball are in contact with the front-court.
It will not be a violation anymore if a player, who jumps from his front-court, establishes a new team control while still airborne and then lands in his team's back-court.
If a player reaches through the basket from below and touches the ball, it is an interference (and not a simple violation) with all the relevant rule consequences.
If a defensive player causes contact with an opponent from behind or laterally in an attempt to stop a fast break and there is no opponent between the offensive player and the opponents' basket, then the contact shall be judged to be unsportsmanlike.
A technical foul can be called on a player for excessive swinging of elbows (without contact).