Sec. 9. "Exclusive representative" means the:
(1) school employee organization that has been:
(A) certified for purposes of this article by the board; or
(B) recognized by a school employer as the exclusive representative of the employees in an appropriate unit;
under IC 20-29-5-1 through IC 20-29-5-5; or
(2) person or persons authorized to act on behalf of a representative described in subdivision (1).