Would assume same as match rules & individual rules on event of a tie.
i.e.
7 - Where regions finish with an equal number of player points, match point allocation will be sorted in the following order: a) The region who has the most player points scorers will be deemed to finish ahead
14 - .......Where players finish with an equal number of player points, the winner will be sorted in the following order: a) The player who has scored player points in the greater number of matches will be deemed to finish ahead.
So logically the team with the most individual point scorers in the league would be the winner.