It shall be the duty of the fund commissioners to select, from time to time, some bank as fiscal agent, where all of the interest on the bonded debt of the state shall be paid, except interest on the state school and seminary bonds or state certificates of indebtedness, the interest on which shall be paid directly out of the state treasury; and whenever a change shall be made in the state’s fiscal agent, the board shall immediately notify the holders of said bonds of such new selection by publication in two metropolitan daily newspapers.