Sec. 7.07. INCREASE IN SURVIVORS' BENEFITS. On the affirmative vote of a majority of the members of the board of trustees either or both of the following actions may be taken:

(1) benefits to dependent children may be increased to an amount not to exceed the amount recommended by the board's actuary; or

(2) benefits to surviving spouses may be increased to an amount not to exceed the maximum approved by the actuary.