All 18 first-class counties will compete in a shortened red-ball tournament named in honour of England legend Bob Willis.
English cricket's 18 counties vote to play both red ball and white ball cricket when the delayed 2020 season starts on 1 August.
Two overseas players will be allowed in County Championship and One-Day Cup teams from the 2021 season.
The delayed 2020 county season will begin on 1 August, the England and Wales Cricket Board confirms.
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Lancashire County Cricket Club CEO Daniel Gidney says safety comes first and that it is "difficult" to talk about sport resuming while deaths from coronavirus are still high.
With coronavirus delaying the start of the 2020 County Championship, test your knowledge of the domestic red-ball game in the last decade.
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