The ICC gave its seal of approval to day-night Test matches while leaving member Boards to decide on the type and colour of the ball to be used, as it announced new playing conditions for Tests, ODIs and T20 Internationals ahead of the Sri Lanka-New Zealand series, beginning Tuesday.
Some countries, including Australia and England, have experimented with day-night Test matches for some time, and with the ICC's decision, on Monday, the longest format of the game may be held under lights very soon.
"Participating countries may agree to play day/night Test matches. The home and visiting boards will decide on the hours of play which will be six hours of scheduled play per day while the two boards will also decide on the precise brand, type and colour of ball to be used for the match," the ICC said.
The world body announced a slew of changes in the playing conditions, including powerplays, fielding restrictions and short-pitched deliveries in the ODIs, Decision Review System (in Tests and ODIs), no-ball, dead ball, over-rates, applicable in all the formats and changes in One Over Per Side Eliminator in T20Is.
"The new playing conditions for Tests, ODIs and Twenty20 Internationals will come into effect with the series between Sri Lanka and New Zealand, which starts in Pallekele on Tuesday 30 October. The amendments have been approved by the ICC Board following proposals made by the ICC Cricket Committee at its meeting in London in May," it said.
"It is important to note that the playing conditions are applicable to international cricket and must be read together with the Laws of Cricket. Whilst a playing condition may affect the Laws of Cricket as they may apply to international cricket, these changes are not amendments to the Laws of Cricket themselves," it added.
Under the new playing conditions, there will be two blocks of Powerplays in an ODI, instead of existing three.
"In an uninterrupted innings, the first Powerplay will be restricted to the first 10 overs with only two fielders allowed outside the 30-yard circle. The second five-over batting Powerplay (in an uninterrupted innings) will have to be completed by the 40th over and only three fielders will be allowed outside the fielding restriction area at the time of delivery.
"In the non-Powerplay overs, no more than four fielders will be permitted outside the 30-yard circle," the ICC said.
On the DRS, applicable to both Tests and ODIs, it said, "Clause 3.3 (ii) of Appendix 2, which deals with LBW protocols, has been amended, margin of uncertainty applicable to the point of impact with the pad has been increased so that it is the same as provided for determining the projected point of impact with the stumps i.e. if the centre of the ball is shown to be impacting in line within an area demarcated by a line drawn down the middle of the outer stumps (and the bottom of the bails), then the decision will always be out.
"If the whole of the ball is shown to be impacting outside the line of the stumps, then the decision will always be not out. If there is anything in between, the original on-field decision will stand.
"As such, this clause will now read as follows: If a 'not out' decision is being reviewed, in order to report that the point of impact is between wicket and wicket (i.e. in line with the stumps), the evidence provided by technology should show that the centre of the ball at the moment of interception is in line within an area demarcated by a line drawn below the lower edge of the bails and down the middle of the outer stumps.
"If an 'out' decision is being reviewed, in order to report that the point of impact is not between wicket and wicket (i.e. outside the line of the stumps), the evidence provided by technology should show that no part of the ball at the moment of interception is between wicket and wicket."
On no-balls, applicable to Tests, ODIs and T20Is, it said, "A clause in Appendix, which deals with no-balls in the Third Umpire TV Replay System, has been amended. This now reads: Following any mode of dismissal that is not permitted off a no-ball and which is not the subject of an Umpire or Player Review, the third umpire shall, subject to the availability of suitable technology, immediately check the fairness of the delivery (foot-fault only).
"If the delivery was not a fair delivery, the third umpire shall advise the on-field umpire by two-way radio who should recall the dismissed batsman, indicate that the batsman is not out and signal no-ball.
"If suitable technology is not available to third umpire, then if on-field umpire is uncertain as the fairness of the delivery (foot-fault only), he shall be entitled to request the batsman to delay leaving the field and check the fairness of delivery (foot-fault only) with third umpire. Consultation with the third umpire shall be by way of two way radio. If the delivery was not a fair delivery the on-field umpire shall indicate that the batsman is not-out and signal no-ball."
Regarding changes in One Over Per Side Eliminator (OOPSE) in T20Is, the ICC said, "In both innings of one over per side eliminator, fielding side shall choose from which end to bowl. Only nominated players in main match may participate in OOPSE.
"Should any player (including the batsmen and bowler) be unable to continue to participate in the OOPSE due to (an) injury, illness or other wholly acceptable reasons, the relevant Laws and Playing Conditions as they apply in the main match shall also apply in the OOPSE.
"Any penance time being served in main match shall be carried forward to OOPSE. The fielding captain or his nominee shall select the ball with which he wishes to bowl his over from the box of spare balls provided by the umpires. Such box to include the balls used in the main match, but no new balls.
"The team fielding first in the OOPSE shall have first choice of ball. The team fielding second may choose to use the same ball as chosen by the team bowling first. If the ball needs to be changed, then playing conditions as stated for the main match shall apply."
