What are the defenders not allowed to do in tchoukball?

In tchoukball, defenders are not allowed to intercept or block the ball when it is thrown towards the rebound surface. They cannot touch the ball or the attacking players during the throw, and they must remain outside a designated area around the rebound surface while the attack is taking place. Additionally, defenders cannot initiate physical contact or engage in defensive maneuvers that would impede the attacking team's play.