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.
West Indies legend Sir Viv Richards is voted as English county cricket's greatest overseas player by BBC Sport users.
The start of the domestic cricket season is delayed again, with no matches before 1 August because of the coronavirus pandemic.
Audio & Video
Former England captain Graham Gooch says he has been "humbled" helping to deliver food to hospitals.
With coronavirus delaying the start of the 2020 County Championship, test your knowledge of the domestic red-ball game in the last decade.
Alastair Cook talks to Jonathan Agnew about the high and lows of his career before his final Test, which begins against India on Friday.
When Alastair Cook terrorised Australia in the 2010-11 Ashes, it was a peak he would never scale again, writes Tom Fordyce.
Analysis and opinion from the BBC's cricket correspondent.
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