(a) Unless otherwise provided in its articles, a bank or trust company, by resolution of its board of directors and with the prior approval of the department, may redeem or otherwise acquire preferred shares. In determining whether or not to give its approval under this subsection, the department shall give primary consideration to the question of whether or not, after the cancellation of the preferred shares, the capital accounts of the bank or trust company would be adequate to support its anticipated deposit or trust business.
(b) Preferred shares which are redeemed or otherwise acquired shall be canceled and shall not be reissued without prior approval of the department.