The Inter-regional event comprises two divisions, and within each division there is a Championship (eight teams per regional squad) and a Challenge (four teams per regional squad). In 2021 there is no separate Juniors competition.
Each team within a region’s squad is ranked, and plays against equally-ranked teams from all other regions in their division.
Results are updated periodically throughout the two days of competition (4th & 5th September 2021).
The Presidents Cup aggregates the score of all a regions squads – both Championship and Challenge – to find the overall best-performing region.