(a) 
There shall be a department of finance, the head of which shall be the city treasurer. The city manager shall appoint the city treasurer for an indefinite term. Subject to and in accordance with this charter, general laws of the state, and such ordinances and other policies as the council may adopt, the city treasurer shall be responsible for the collection or receipt of revenue and other money for the city, and for its custody, safekeeping, deposit, and disbursement; shall maintain a general accounting system for the city government; and shall have such other powers and duties as are prescribed by this charter, by ordinance consistent with this charter, or by general laws of the state.
(b) 
All warrants and other orders for the disbursement of money shall be signed by such officers of the city as the council may require by ordinance.
(a) 
The city manager, subject to any regulations which the council may adopt, shall contract for and purchase, or issue purchase authorizations for, all supplies, materials, and equipment for the offices, departments, and agencies of the city government. Every such contract or purchase exceeding an amount to be established by ordinance, shall require the prior approval of the council. The city manager also may transfer to or between offices, departments, and agencies, or sell, surplus or obsolete supplies, materials, and equipment, subject to such regulations as the council may adopt.
(b) 
Before the purchase of, or contract for, any supplies, materials, or equipment, or the sale of any surplus or obsolete supplies, materials, or equipment, ample opportunity for competitive bidding, under such regulations and with such exceptions, as the council may prescribe, shall be given; but the council shall not except an individual contract, purchase, or sale from the requirement of competitive bidding.
(c) 
The council by ordinance may transfer some or all of the power granted to the city manager by this section to an administrative officer subordinate to the city manager.
The sale, lease, or other alienation of any city property, real or personal, including public utilities, or of any interest therein, the value of which is more than $50,000, may be made only (1) by authority of an affirmative vote of a majority of the qualified voters of the city who vote on the question of approving or authorizing the sale, lease, or other alienation at an election, or (2) by authority of a special ordinance. Such ordinance shall be published in full in a newspaper of general circulation within the city within ten days after its passage, and shall take effect thirty days after passage unless the ordinance specifies a later date,. The sale, lease, or other alienation of an entire public utility or of any substantial part thereof may be authorized only as provided in (1) hereinabove.
Public improvements may be made by the city government itself or by contract. The council shall award all contracts for such improvements; provided, that the council may authorize the city manager to award such contracts not exceeding an amount to be determined by the council and subject to such regulations as the council may prescribe. A contract for public improvements of more than $2,000 may be awarded only to the lowest responsible bidder after such notice and opportunity for competitive bidding as may be prescribed by law. All bids may be rejected, and further notice and opportunity for competitive bidding may be given.
The council shall designate a certified public accountant or firm of such accountants who shall make an independent audit of the accounts and evidences of financial transactions of the department of finance, of the department of taxation, and of all other departments, offices, and agencies keeping separate or subordinate accounts or making financial transactions, as of the end of every fiscal year at least, and who shall report to the council and to the city manager.