CODE OF SIGNALLING.
Boundaries shall be signalled by waving the hand from side to side.
Byes shall be signalled by raising the open hand above the head.
Leg-byes shall be signalled by raising the leg and touching it with the hand.
Wides shall be signalled by extending both arms horizontally.
No-balls shall be signalled by extending one arm horizontally.
The decision Out shall be signalled by raising the index finger above the head.
Umpires should wait until a signal has been answered by the scorer before allowing the game to proceed.
Besides signalling, the umpire should “call” distinctly for the information of the players.
On giving a decision the umpire should make sure that the batsman understands what the decision is.