(a) The credit union's board of directors shall establish the dividend period. Rates of dividends and the terms of payment may be established in advance by action of the board of directors. Dividends may be paid at various rates with due regard to the conditions that pertain to each type of account such as minimum balance, notice and time requirements.
(b) The commissioner may, if circumstances warrant, establish the maximum dividend that a credit union or corporate credit union may pay in each classification of its savings.