Ind. Code § 23-13-16-4
Any university or college organized before July 8, 1941, under the laws of this state, whether by special law or under general laws, whose charter, whether by virtue of the special law creating such university or college or by virtue of general laws whose provisions have been accepted by it, contains provisions concerning the appointment and number of the board of trustees or board of directors of such university or college may have and is hereby given the right to amend its charter in respect to the number of persons on its board of trustees or board of directors by the adoption of a resolution passed by a majority vote of its board to that effect, and by filing proof of such adoption, verified by at least a majority of its directors. The charter shall be deemed to be amended as of the date when such proof is filed in the office of the secretary of state. However, the provision of this section shall not apply to any state college or university.
IC 23-13-16-4