(1) A state trust company may acquire its own shares if:
(a) The amount of its capital is sufficient to fully absorb the acquisition of the shares under regulatory accounting principles; or
(b) The state trust company obtains the prior written approval of the director.
(2) A state trust company may acquire a lien upon its own shares if:
(a) The aggregate amount of indebtedness so secured is less than the amount of the state trust company's capital; or
(b) The state trust company obtains the prior written approval of the director.