Section 4: Players & Officials

Players must conduct themselves in accordance with the BWF Code of Conduct. Players may not receive coaching from outside the court during a match except during the intervals described in Law 16 (Intervals and Suspension of Play).

Source: Law 4, Law 6, Law 5, Law 8.4, Law 10, Law 16, Law 17, Law 18, Law 9.1, Law 16.2, Law 16.3, Law 16.4, Law 16.5

Send this to your friend — argument over.