9.1. In a correct service, the flight of the shuttle shall be upwards from the server’s racket to pass over the net so that, if not intercepted, it shall land in the receiver’s service court (i.e. on or within the boundary lines); and
9.1.1. neither side shall cause undue delay to the delivery of the service once the server and the receiver are ready for the service.
9.1.2. on completion of the backward movement of the server’s racket head, any delay in the start of the service (Law 9.2) shall be considered to be an undue delay;
9.1.3. the server and the receiver shall stand within diagonally opposite service courts (Diagram A) without touching the boundary lines of these service courts;
9.1.3.1. In Para badminton Wheelchair and Standing Classes playing half-court, Diagram D and F, respectively, apply.
9.1.4. some part of both feet of the server and the receiver shall remain in contact with the surface of the court in a stationary position from the start of the service (Law 9.2) until the service is delivered (Law 9.3);
9.1.4.1. In Wheelchair Badminton: from the start of the service and until the service is delivered, the wheels of the server and the receiver must be stationary, except the natural counter movement of the server’s wheelchair.
9.1.4.2. In Para Badminton there can be exceptions to 9.1.4 for players that are medically justified by the Head of Classification (HoC). The Referee and the Technical Delegate will refer to a list of players provided by the HoC when applying these exceptions.
9.1.5. the server’s racket shall initially hit the base of the shuttle;

9.1.6. the whole shuttle shall be below 1.15 metres from the surface of the court at the instant of being hit by the server’s racket;
9.1.6.1. In Wheelchair Badminton, the whole shuttle shall be below the server’s armpit at the instant of being hit by the server’s racket; Alternative Service Law 9.1.6 (b) also applies.
9.1.6.2. In Para badminton Standing Classes, the Alternative Service Laws apply (9.1.6 (a) and (b)).
9.1.7. the movement of the server’s racket shall continue forwards from the start of the service (Law 9.2) until the service is delivered (Law 9.3);
9.1.8. in attempting to serve, the server shall not miss the shuttle.
9.2. Once the players are ready for the service, the first forward movement of the server’s racket head shall be the start of the service.
9.3. Once started (Law 9.2), the service is delivered when the shuttle is hit by the server’s racket or, in attempting to serve, the server misses the shuttle.
9.4. The server shall not serve before the receiver is ready. However, the receiver shall be considered to have been ready if a return of the service is attempted.
9.5. In doubles, during the delivery of service (Law 9.2, 9.3), the partners may take up any positions within their respective courts, which do not unsight the opposing server or receiver.