The ICC Standard Playing Conditions for Twenty20 matches provide the playing framework for all Twenty20 cricket. They are updated every year to reflect developments in the game.
Below is a brief descriptionof the rule changes in Twenty20 cricket, click here for a full copy of the Twenty20 Rules.
One innings per side, each innings limited to a maximum of 20 overs
The interval will normally be of 15 minutes duration. In reduced overs matches, the interval will be cut to 10 minutes.
Re-arrangement of Overs
Teams have one hour 15 minutes to bowl 20 overs. In the first innings, the calculation of the number of overs to be bowled shall be based on one over for every full 3.75 minutes in the total time available for play up to the scheduled close of play. In the second innings of the match, overs shall be reduced at a rate of one over for every full 3.75 minutes lost, unless the first innings finished early / second innings started early in which case no overs are lost until the time that has been gained is subsequently lost.
The incoming batsman must be in position to take guard or for his partner to be ready to receive the next ball (or for his partner to receive the next ball) within one minute 30 seconds of the fall of the previous wicket.
Each side must have faced (or had the opportunity to face) five overs in order to constitute a match. The Duckworth Lewis Method shall be used in interrupted matches.
Restrictions on the Placement of Fieldsmen
Fielding restrictions apply for the first six overs of each innings.
Number of Overs per Bowler
Each bowler may bowl a maximum of four overs. In a delayed or interrupted match, no bowler may bowl more than one fifth of the total overs allowed unless such a number has been exceeded before the interruption.
Free Hit after a Foot Fault No Ball
This will apply.
Short Pitched Bowling
As in other one-day competitions, one short-pitched ball is allowed per over.
The six-run penalty for each over not bowled will apply - all sides are expected to be in position to bowl the first ball of the last of their 20 overs within one hour 15 minutes playing time. In reduced over matches, the fielding side has one over's leeway in addition to any time that the Umpires may allow for stoppages.
Umpires are instructed to apply a strict interpretation of time-wasting by the batsman (five-run penalties). Specifically, batsmen are expected to be ready for the start of a new over as soon as the bowler is ready.
Net Run Rate
A team's net run rate is calculated by deducting from the average runs per over scored by that team, the average runs per over scored against that team.
In the event of a team being all out in less than its full quota of overs, the calculation of its net run rate shall be based on the full quota of overs to which it would have been entitled and not on the number of overs in which the team was dismissed.
Only those matches where results are achieved will count for the purpose of net run rate calculations. Where a match is abandoned, but a result is achieved under Duckworth/Lewis, for net run rate purposes Team 1 will be accredited with Team 2's Par Score on abandonment off the same number of overs faced by Team 2.
Where a match is concluded but with Duckworth/Lewis having been applied at an earlier point in the match, Team 1 will be accredited with 1 run less than the final Target Score for Team 2 off the total number of overs allocated to Team 2 to reach the target.