The board of directors shall establish from time to time a written savings capital structure policy which shall set out the various terms and conditions upon which credit union shares may be issued, paid for, transferred, and withdrawn. The savings capital structure policy may provide for different rates, maturities and minimum share account balances, subject to the rules of the commissioner for the credit union’s savings capital and the terms and conditions on which dividends may be calculated and paid to member’s purchasing credit union shares. The savings
capital structure policy shall have as its goal avoiding instability in the credit union’s savings capital and thereby providing that credit union members have an adequate source of funds for loans and receive a fair return on member savings capital.