3(d)

At the beginning of each game and each time a side becomes "in'' the ball shall be served from whichever service box the first server for the side elects, and thereafter alternately until the side is "out'' or until the end of the game. If the server serves from the incorrect box there shall be no penalty and the service shall count and the play shall proceed as if the box served from was the correct box, except that if the receiver does not attempt to return the service, he may demand that it be served from the other box, or if, before the receiver attempts to return the service, there is a Let (See Rule 7), the service shall be made from the other box.