1. Each municipality shall adopt an appropriation for each purpose as established by the governing body;

2. In all cases the appropriations shall not exceed the income and revenue provided by the governing body from estimated revenues and appropriated fund balance;

3. The adopted budget shall be in effect on and after the first day of the fiscal year to which it applies. The budget as adopted and filed with the State Auditor and Inspector shall constitute an appropriation for each purpose as defined by the governing body, and the appropriation thus made shall not be used for any other purpose except as provided by law;

4. The chief executive officer, or designee, as authorized by the governing body, may transfer any unexpended and unencumbered appropriation or any portion thereof from one purpose to another; except that no appropriation for debt service or other appropriation required by law or ordinance may be reduced below the minimums required;

5. No encumbrance or expenditure may be authorized or made by any officer or employee which exceeds the available appropriation for each purpose as defined by the governing body;

6. The governing body may amend the budget to make supplemental appropriations to any purpose up to the amount of additional unappropriated income and revenues which become available during the fiscal year;

7. If at any time during the budget year it appears probable that revenues available will be insufficient to meet the amount appropriated, or that due to unforeseen emergencies there is temporarily insufficient money to meet the requirements of appropriation, the governing body shall take action as it deems necessary. For that reason, it may amend the budget to reduce one or more appropriations or it may amend the budget to transfer money from one purpose to another purpose, but no appropriation for debt service may be reduced and no appropriation may be reduced by more than the amount of the unencumbered and unexpended balance thereof. No transfer shall be made from the debt service fund to any other fund except as may be permitted by the terms of the bond issue or applicable law; and

8. A budget amendment as provided in this section authorizing supplemental appropriations or a decrease in the total appropriation of funds shall be adopted at a meeting of the governing body and filed with the municipal clerk and the State Auditor and Inspector.