Funds to pay the increases provided in this act shall be provided in the budgets of the county, municipality or school district from whose service the veteran retired on pension and shall be added to pension payments payable for any period after January 1, 1968 or shall be added to pension payments retroactively to January 1, 1968 as to any pension payable by a school district having a fiscal year commencing in 1968 on a date other than on January 1.
The increase in pension shall continue to be paid as long as there shall be appropriated the amounts required. In the event that the necessary funds are not so appropriated, the increase in pension shall cease.