The ITF (International Tennis Federation) Rules for Tennis apply with the following exceptions:
Any racket accepted by the ITF in accordance with court sizes.
Both the server and the receiver may ask an umpire or ball person their own position on court, in order to locate on the court.
Before starting the service motion the server must call “ready?” and wait for the receiver to reply “yes”. The server then has 5 seconds to serve the ball during which time s/he may not alter their position on the court. The server must shout “play” immediately before hitting the ball.