Sec. 11. (a) The board of a savings bank may, by resolution incorporated in the bylaws of the savings bank, reduce the number of trustees to a number not less than the minimum number required by section 3 of this chapter.
(b) If the board adopts a resolution under subsection (a), the number of trustees may be reduced by not filling vacancies on the board as vacancies occur until the number of trustees reaches the number set in the resolution.