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this clause (b) shall be payable only until such time as the aggregate amount on deposit under each trust indenture securing Bonds issued and outstanding pursuant to the Build Illinois Bond Act is sufficient, taking into account any future investment income, to fully provide, in accordance with such indenture, for the defeasance of or the payment of the principal of, premium, if any, and interest on the Bonds secured by such indenture and on any Bonds expected to be issued thereafter and all fees and costs payable with respect thereto, all as certified by the Director of the Bureau of the Budget (now Governor's Office of Management and Budget). If on the last business day of any month in which Bonds are outstanding pursuant to the Build Illinois Bond Act, the aggregate of the moneys deposited into in the Build Illinois Bond Account in the Build Illinois Fund in such month shall be less than the amount required to be transferred in such month from the Build Illinois Bond Account to the Build Illinois Bond Retirement and Interest Fund pursuant to Section 13 of the Build Illinois Bond Act, an amount equal to such deficiency shall be immediately paid from other moneys received by the Department pursuant to the Tax Acts to the Build Illinois Fund; provided, however, that any amounts paid to the Build Illinois Fund in any fiscal year pursuant to this sentence shall be deemed to constitute payments pursuant to clause (b) of the preceding sentence and shall reduce the amount otherwise payable for such fiscal year pursuant to SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468