(1) Keep all accounting or financial records of all departments of the city government, and of all other departments, the expenses of which are paid out of the city treasury.

(2) Have power to require such additional and supporting, accounting or financial records to be kept and to be rendered to his department by the other departments of the city government, the expenses of which are paid out of the city treasury, as may to him seem necessary, and shall prescribe the nature, form, and extent of all such supporting records. He shall have complete supervision and control over such records and accounts. All employes engaged in the keeping of any of the books or accounts prescribed by the city controller, or forming part of the city's bookkeeping system, shall be under the control and supervision of the city controller.

(3) Have power to prohibit the keeping of any accounting or financial records by any department, the expenses of which are paid out of the city treasury, except those provided for in this section.

(4) Have supervision and control over the manner of all expenditures, and shall not approve any warrant, commitment or any contract, involving the payment of money by any department, unless there are funds available for the payment of such commitment in the specific item of appropriation made therefor.

(5) Have supervision and control over the form of all vouchers and warrants, and shall prescribe the manner of payment thereof.

(6) Have supervision and control over the manner, method, and place of payment of all bills for amounts due and payable into the city treasury, and shall prescribe the form and method of preparing all bills and receipts.

(7) Have supervision and control over all payrolls. All paymasters and the place of all payments shall be in the controller's department under his exclusive control.