Any police officer and any eligible surviving spouse, child or children, or dependent parent of the officer to whom the board has ordered benefits to be paid, shall receive a yearly benefit payable in 12 equal monthly installments, which shall be the aggregate amount to which they are entitled.
     If at any time there is not sufficient money in the fund to pay the benefits under this Article the city council or board of trustees of the municipality shall make every legal effort to replenish the fund so that all beneficiaries may receive the amounts to which they are entitled.