The England and Wales Cricket Board has proposed a 100-ball-a-page format for a new domestic competition starting in 2020.
It was believed that the eight teams men's and women's contests city-based sites instead For the traditional 18 first class counties, would have a standard 20-overs per page format.
But the English men's county cricket, which pioneer 20-game over as a professional format, already has Twenty20 Blast, while Women's Super League is also a 20 overs for each side competition.
Instead of making the new tournament "different", the ECB has now chosen an untested and briefer format that, if adopted, differentiates the event from existing Twenty20 franchise competitions such as the Indian Premier League and the Caribbean Premier League, both of which are currently being cut over the English season.
A ECB statement released Thursday said the competitions would take place in a fiv e-week block in the middle of the season.
Cricket now has 5 days, 4 days, 3 days, 2 days, 50 overs, 40 overs, 20 overs, T10 league, Hong Sixes and 100 ball comp … … Good luck to understand our big game !!!!!!! #OnOn
– Michael Vaughan (@MichaelVaughan) April 19, 2018
Under the proposal, which has not yet been finalized, each team exceeds 15 standard six balls with an additional 10-ball over at the end of innings.
This would mean that the tournament differs from cricket's law 17.1, which clearly states: "The ball must be bent from each end alternately in the overlay of six balls." One hundred balls are shorter than a standard Twenty20 innings, which equals 120 balls.
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The plan was put to the presidents and top leaders in the first classes and MCC, the owners of Lord's Cricket Ground, by the ECB on Thursday .
"This is a fresh and exciting idea that will appeal to a younger audience and attract new fans to the game," said Tom Harrison, Managing Director of the ECB. 19659003] "In all its development, we have shown leadership, assumed to challenge and followed a process. We will continue to do that as the concept evolves."
Meanwhile, Paceman Stuart Broad said on Thursday that he was for it new format.
"I'm very optimistic, I love the fact that it's different from all the other tournaments worldwide – 15 six-balls overs and then 10-ball pushed to finish," Broad told Sky Sports.
Asked how he would feel about bowling the final 10-ball over, Broad added: "I think I prefer the first set! You enter the unknown little because the tactical side of the game has not been used anywhere in the world. "
Former English captain Michael Vaughan wrote on Twitter, be more careful in his support.  "May be confusing that another format has been created .. But it will be fun and entertaining. I have no doubt. 8 franchisees will be good at the game in Britain," said Vaughan.