The city clerk is authorized, empowered and directed to issue warrants on and against the fund in payment of salaries, wages, materials furnished, services rendered or expenses or liabilities incurred by the various departments and offices of the city. The warrant shall be issued only after there has been filed with the city clerk proper vouchers, approved by the city council, stating the nature of the claim/payroll, the amount due or owing and the person, firm or corporation, entitled thereto. All warrants issued on or against the fund shall be solely and only for the purposes set forth in this chapter and shall be payable only out of and from the fund. Each warrant issued under the provisions of this section shall have in its face the words: “Claims/Payroll Clearing Fund.”