A. If the original or amended certificate of incorporation of a bank other than a savings bank so provides, a plan or plans may be adopted and maintained by such bank pursuant to resolution of its board of directors; otherwise, such bank may adopt and maintain a plan or plans only with the approval of a majority in interest of its stockholders.
B. A savings bank may adopt and maintain a plan or plans pursuant to a resolution of its board of managers.
C. The officers and employees of a subsidiary of a bank may be included in a retirement plan of a bank with the same effect as if such officers and employees were employed by the bank, or upon such other terms and provisions as the plan may provide; but, in such case, all employer contributions and other employer charges required to be made or paid to a fund by reason of the inclusion of the officers and employees of a subsidiary shall be made or paid by the subsidiary.