The ceiling and anything on it is playable on your side assuming you still have contacts to use. If the ball hits any part of the ceiling and travels directly to the opponents court it is an automatic side out. The walls are out of bounds. The official will call a replay anytime a ball from the other court interferes with the match. No protests will be allowed.
Official decisions are final.
The team captain is the only player allowed to talk with the official. Officials may card players if necessary. A yellow card is a warning. A red card is a side out or point for the other team. A yellow and a red card together is expulsion from that match and a suspension for the next match.