With the consent of the budget officer, or the approval in charter cities as required by charter, the head of any department may transfer any unencumbered or unexpended appropriation balance or any portion thereof from one expenditure account to another within the department during the budget period, or an excess expenditure of one or more line items may be permitted by any department head with the consent of the budget officer, or his equivalent in charter cities, provided the total of all excess expenditures or encumbrances do not exceed total unused appropriations within the department at the close of the budget period.
Utah Code § 10-6-124