Law 14 (Declaration and forfeiture)
1. Time of declaration
The captain of the batting side may declare an innings closed, when the ball is dead, at any time during a match.

2. Forfeiture of an innings
A captain may forfeit either of his side's innings. A forfeited innings shall be considered as a completed innings.

3. Notification
A captain shall notify the opposing captain and the umpires of his decision to declare or to forfeit an innings.