The approved budget governs the expenditures of the county during the fiscal year. No expenses may be incurred in excess of those shown in the approved budget, but the county commissioners may transfer funds as provided in section 922, and the budget may be from time to time revised by the preparation and submission of a proposed amended budget by the county commissioners to the budget committee. The budget committee shall within 15 calendar days approve, disapprove or amend this revised budget. A report of approval of a revised budget must be transmitted to the State Auditor within 15 days of the approval.   [PL 1999, c. 253, §9 (AMD).]