RICHMOND, Va. (AP) — The National Federation of State High School Associations has told its members to adopt a rule regulating the number of pitches a high school pitcher can throw in a game.

The federation did not proscribe a specific number. NFHS director of sports and student services Elliot Hopkins said Tuesday it simply wants local associations legislate a pitch count by next season.

The rule will go into effect in the spring of 2017.

Every state plus the District of Columbia is a federation member, Hopkins said, with governance over the largest, typically public association. Each state except Michigan has its own sports medicine advisory committee that will likely be involved in settling on a specific number.