1. Expenditures from the operating fund shall be made only upon duly approved payrolls and vouchers for the purposes herein before ascribed to said account;

2. Expenditures from the reserve fund shall be made only upon duly approved vouchers for the purposes herein before ascribed to said account.

3. All moneys deposited in each equipment rental fund and not expended as provided herein shall remain in such fund from year to year and shall not be transferred to any other fund or expended for any other purpose whatsoever, except by popular vote of the people at the next general election. Such a popular vote is only necessary if the particular equipment rental fund is still in existence and if, at any time hereafter, the city council of the city of Aberdeen shall abolish either equipment rental fund, then all moneys on deposit therein shall revert to and be deposited in the funds of the several departments participating in the fund.