The first serve of the game is made from the right service court and received in the diagonal right service court, as are all serves when the server's score is zero or an even number. When the server's score is odd, the serve is made from the left service court and received in the diagonal left service court. During the serve the shuttle does not fall within the boundaries of the diagonal service court. During the serve the feet of the server and the receiver are not within the boundaries of their respective service courts. Feet on the boundary lines are considered out of bounds.
Any player reaches across the net to contact the shuttle, other than on the follow-through.
During play any player's person, clothing, or racket touches the net or supports. The shuttle is hit more than once in succession by a player or is hit in succession by partners or caught or slung when struck. Wood shots and simultaneous striking of the base and feathers of the shuttle are legal if no slinging or catching occurs. A player obstructs an opponent or invades an opponent's court. In play, a player standing in bounds or out of bounds contacts the shuttle with any part of their person or is struck on any part of their person by the shuttle.