Ball regulations for league play
Extract from the NSA Bylaws 2014:
12. BALL
12.1 The official ball is the ball as determined by The NSA is the Dunlop High Altitude (Green Dot) ball for the period 1 September to 30 April for all league play. From 1 May to 31 August the Dunlop High Altitude ( Green Dot ) ball will be the official ball for Men’s 1st and Reserve league and Ladies 1st League. From 1 May to 31 August the Dunlop Pro Revelation (Double Yellow Dot) ball will be the official ball for Men’s 2nd league and lower and Ladies Reserve league and lower. In the event that both players wish to play and both agree, in the lower leagues the Dunlop High Altitude (Green Dot) ball may be used.

Hi there
Is this ball regulation for league play still the same for 2021?
Good day
Here is an extract from the NSA Bylaws 2021:
12. BALL
12.1 The official ball is the ball as determined by The NSA is the Dunlop High Altitude (Green Dot) ball for the period 15 September to 30 April for all league play.
12.2 From 1 May to 14 September the Dunlop High Altitude (Green Dot) ball will be the official ball for Men’s 1st to 4th league and Ladies 1st League number one string players.
12.3 From 1 May to 14 September the Dunlop Pro Revelation (Double Yellow Dot) ball will be the official ball for Men’s 5th league and lower and Ladies First league second string players and lower. If both players agree, in the lower leagues, the Dunlop High Altitude (Green Dot) ball may be used.