The International Cricket Council has announced new powerplay rules for shortened T20 matches and clearly defined the number of overs allowed upfront with a restricted field.

The International Cricket Council on Thursday announced new powerplay rules for shortened T20 matches and clearly defined the number of overs allowed upfront with a restricted field in its new Playing Conditions for the shortest format.
As per the new rules effective from July
As per the new rules effective from July, a reduced game of eight overs in an innings, which would have three overs as powerplay, will now have 2.2 overs of powerplay with only two fielders outside the 30-yard circle.
Similarly, for a five-over innings, 1.3 overs will be of the powerplay.
The ICC table on its website said…
The ICC table on its website said for a six-over innings, 1.5 overs will be of powerplay; 2.1 overs of powerplay for a seven-over innings, 2.2 overs for an eight-over innings, whereas a nine-over innings will have 2.4 overs of powerplay.
For an innings of 10 overs, three of those will be powerplay overs. For an 11-over innings, 3.2 overs will be of powerplay, for a 12-over innings, 3.4 overs will be of powerplay.
Similarly, 3.5 overs of powerplay will be for 13-over innings, 4.1 overs of powerplay for 14-over innings, 4.3 overs of powerplay for 15-over innings and 4.5 overs of powerplay have been slotted in the updated ICC table for 16-over innings.