Games across the board were restricted to 40-overs per side last year, but the league intends to return to a 50, 45 and 40-over format down the 19-division pyramid when play begins on May 7 2022.
That means Division 1 matches will be 50-overs per side, with a restriction of ten overs per bowler, with play starting at 12.30pm.
Games in Divisions 2 and 3 will last 45 overs (nine overs per bowler) with 1pm starts.
Divisions 4 to 6 will be of a 40-over duration (eight overs per bowler) again starting at 1pm.