ICC confirms ODIs will revert to single-ball finish from July

Since October 2011, ODIs have featured two new balls at the start of the innings, instead of a replacement ball being offered at the 35-over mark. The new PCs will see two new balls still being used at the start of the innings but once 34 overs are completed, the bowling side will have the option of using one of the two white-rocks for the remainder of the innings. The switch in rules is meant to address the lack of reverse swing for pacers and lack of aid for the spinners as balls currently are deemed not to detoriate enough in the 25 overs they are used for.     

‌"There will be two new balls for overs 1 to 34. After over 34 is completed and prior to the start of over 35, the fielding team will choose one of the two balls to be used for overs 35 to 50. The chosen ball will be used at both ends for the remainder of the match (unless it needs to be changed). In a match reduced to 25 overs or less per side before the first innings commences, each team shall have only one new ball for its Innings," the ICC stated.

As for the concussion substitutes rules, teams will now have to submit a list of five players to the match-referee featuring a batter, a wicket-keeper, an all-rounder, a spinner, and a seamer. The rule had come under wild speculation earlier this year when pacer Harshit Rana was allowed as a concussion-substitute for all-rounder Shivam Dube for India's bowling innings, with the former claiming man-of-the-match honours to help secure victory against England.