ICC Stop Clock rule which is under trial from December 2023 will be incorporated into the standard playing conditions effective June 1, 2024 - the day the T20 World Cup 2024 will kick off. The rule will be applied to all the ODI and T20I matches between Full Members.
Therefore, the rule will not be implied in the first match of the T20 World Cup 2024 between United States and Canada, the second game between West Indies and Papua New Guinea, and the third between Namibia and Oman.

Full members Sri Lanka and South Africa will be the first team which will play under the new Stop Clock Rule in match number four of the T20 World Cup 2024 in New York on June 2.
As per the rule the fielding team would be imposed with a five-run penalty if they don't start the next over within 60 seconds or a minute. The bowling team would be warned twice in case of delay, and the subsequent breaches will lead to a five-run penalty per incident. The Stop Clock will start the countdown just after the completion of an over.
"The stop-clock is set to become permanent in all ODIs and T20Is from June 2024, starting with the ICC Men's T20 World Cup 2024 in the West Indies and USA,” the ICC said in a statement after its Annual Board Meeting.
"The trial was supposed to run until April 2024, but the experiment has already yielded results in terms of timely completion of matches, saving approximately 20 minutes per ODI match," the statement added