For those age groups preceded by the word "Under" (U), your age is determined as your actual age on the 31st December in the year of your registration. EG. if on 31st December you are 10, even if you are 10 years old on the 1st January, you are an Under 10.
For those age groups preceded by the word "Over"(O) (35s, 45s and 30 Women), the opposite applies. It is your age on the 31st December in the year previous to which you register.
All Age is "open" to players of all ages. (BDFSA minimum requirement is 15 years old to play in All Age IE 15 years old on 31st December in the previous year to registration).