At any time after January 1 following the making of an annual tax levy, the council may issue certificates of indebtedness in anticipation of the collection of taxes levied for any fund and not yet collected. The total amount of certificates issued against any fund for any year with interest thereon until maturity shall not exceed 90% of the total current taxes for the fund uncollected at the time of issuance. Such certificates shall be issued on such terms and conditions as the council may determine, but they shall become due and payable not later than the 1st day of April of the year following their issuance. The proceeds of the tax levied for the fund against which tax anticipation certificates are issued and the full faith and credit of the city shall be irrevocably pledged for the redemption of the certificates in the order of their issuance against the fund.