(b) The prior approval of the commissioner of banking shall be required if the total of all dividends declared by such banking institution in any calendar year shall exceed the total of its net profits of that year combined with its retained net profits of the preceding two years;
(c) For the purpose of this section the term "net profits" shall mean the remainder of all earnings from current operations plus actual recoveries on loans and investments and other assets, after deducting from the total thereof, all current operation expenses, actual losses, and all federal and state taxes;
(d) Any director voting to declare any dividend, in violation of the provisions of this section, shall be personally liable to the creditors of such banking institution for any loss occasioned thereby, and shall be guilty of a misdemeanor.