A central accounting system shall be established, and insofar as local conditions will permit, all functions of accounting, financing, inventory, and budget controls will be centralized therein. The City Manager shall perform, or delegate to one or more officers designated by him, the following duties and responsibilities:
(a) supervise and be responsible for the disbursement of all moneys and have control over all expenditures to ensure that budget appropriations are not exceeded;
(b) maintain a general accounting system for the city government and each of its offices, departments and agencies, keep books for and exercise financial budgetary control over each office, department and agency, keep separate accounts for the items of appropriation contained in the city budget, each of which accounts shall show the amount of the appropriation, the amounts paid therefrom, the unpaid obligations against it and the unencumbered balance; require reports of receipts and disbursements from each receiving and spending agency of the city government to be made daily or at such intervals as he may deem expedient;
(c) submit to the Council a monthly statement of all receipts and disbursements in sufficient detail to show the exact financial conditions of the City of Longview;
(d) have custody of all public funds belonging to or under the control of the City of Longview, or any office, department or agency of the city government, and deposit all funds coming into his hands in such depository or depositories as may be designated by the City Council, subject to the requirements of law in force from time to time as to the furnishing of bond, the deposit of securities, the awarding of the depository contract and the payment of interest on deposits;
(e) have custody of all investments and invested funds of the city government, or in possession of such government in a fiduciary capacity, and have the safekeeping of all bonds and notes of the City of Longview and the receipt and delivery of City of Longview bonds and notes for transfer, registration or exchange; however, all investments of public funds shall be governed by the Public Funds Investment Act in Chapter 2256 of the Texas Government Code, as amended, or as otherwise specified by state law.;
(f) supervise and be responsible for the purchase, storage and distribution of all supplies, materials, equipment and other articles used by any office, department or agency of the city government and prepare the periodical inventories of supplies, materials and city-owned property; and
(g) approve all proposed expenditures and unless there is an unencumbered balance of appropriations and available funds, no expenditure shall be made.