The body having control of the finances of any city wherein the school buildings and other school property of the city school district are insured in the municipal insurance fund may, from time to time, if in its judgment advisable, appropriate additional sums of money to the municipal insurance fund of the city from moneys under its control not otherwise appropriated, or by raising such sums in the tax levies for the years in which they are severally appropriated.
N.J.S. § 18A:20-30