Indiana Code Title 5. State and Local Administration § 5-1.2-4-7

Sec. 7. Except as may otherwise be expressly provided by the authority, every issue of its bonds shall be obligations of the authority payable solely out of any specified revenue or money of the authority, subject only to any agreements with the holders of particular bonds pledging any particular money or revenue.  The bonds may be additionally secured by a pledge of any grant, contribution, or guarantee from the federal government or any corporation, limited liability company, association, institution, or person or a pledge of any money, income, or revenue of the authority from any source.