The board of a state trust company is responsible for the proper exercise of fiduciary powers by the state trust company and each matter pertinent to the exercise of fiduciary powers, including:
(1) the determination of policies;
(2) the investment and disposition of property held in a fiduciary capacity; and
(3) the direction and review of the actions of each officer, employee, and committee used by the state trust company in the exercise of its fiduciary powers.