A. The board may receive property of any nature for the benefit of the fund.
B. If the municipality has a population of over fifty thousand, the sum of fifty thousand dollars shall be retained as a permanent fund. No pension shall be paid or money drawn from the fund until the sum of fifteen thousand dollars, over and above the fifty thousand dollars held as a permanent fund is to the fund's credit.
C. If the municipality has a population of over fifteen thousand, but not exceeding fifty thousand, the sum of fifteen thousand dollars shall be retained as a permanent fund. No pension shall be paid or money drawn from the fund until the sum of fifteen hundred dollars, above the fifteen thousand dollars held as a permanent fund, is to the fund's credit.
D. If the municipality has a population of fifteen thousand, or less, the sum of seventy-five hundred dollars shall be retained as a permanent fund. No pension shall be paid or money drawn from the fund until the sum of one thousand dollars, above the seventy-five hundred dollars held as a permanent fund, is to the fund's credit.