Ind. Code § 4-9.1-1-8
For the purpose of meeting casual deficits in the state revenue, the board may negotiate such loans as may be necessary to meet the demands of the state. The loan may not be made for a longer period than four (4) years after the end of the fiscal year in which the loan is made. To evidence the loan, the board may execute certificates of indebtedness or promissory notes, which certificates or notes must recite that they are issued to meet casual deficits in the state revenue.
If there are not sufficient funds coming into the general fund of the state to pay the certificates or notes when due, the board may, notwithstanding IC 6-1.1-18-2, levy a tax on all the taxable property of the state, sufficient to pay the amount of the indebtedness.
IC 4-9.1-1-8