Formed in 1977, NYSSO is affiliated with the NYSPHSAA under whose auspices it has exclusive rights to all high school softball played in the 11 sections of New York state. All play is governed by ASA rules with NYS specific modifications.

NYSSO is comprised of 30 local chapters, each of which is responsible for training and certifying officials under the eight point program mandated by NYSPHAA.