From the 2014 Spring Grand program, link to Program above from the ATA site
CLASSIFICATION AND HANDICAP
Shooters who do not have a combined total of 1,000 16 yard targets registered with the ATA in the current and previous year will be advanced at least one class or more at the discretion
of the classification committee. Shooters without an established average will be placed in class B or higher at the discretion of the classification committee.
Shooters who do not have a combined total of 1,000 doubles targets registered with the ATA in the current and previous year will be advanced at least one class or more at the discretion of the classification committee. Shooters without an established average will be placed in class B or higher at the discretion of the classification committee.
Shooters who do not have a combined total of 1,000 handicap targets registered with the ATA in the current and previous year will be assigned penalty yardage or shoot their handicap card yardage whichever is greater. Yardage assignment for Junior and Adult males is 23.0 yards. Yardage assignment for Lady, Sub Junior, Veteran and Senior Veteran Category shooters shall be 20.0 yards.