[2] In July 2021, New Zealand Cricket named all the squads for the domestic teams ahead of the 2021–22 season.
[4] In September 2021, New Zealand Cricket announced the schedule for the tournament.
[5] However, due to the impact of the COVID-19 pandemic in New Zealand, two of the opening round fixtures were postponed,[6] and were rescheduled for a later date.
[10] It was the highest number of debutants in the same match for Northern Districts since their inaugural first-class fixture in 1956.
Teams were ranked by average points per completed match, including abandoned matches, which earned four points, but the regulations excluded the Covid-affected draw between Northern Districts and Central Districts from the calculations.