Indiana Code Title 5. State and Local Administration § 5-20-2-11

Sec. 11. Lien of Bonds.  Bonds issued under this chapter and the interest on them may be secured by a pledge of or lien upon the revenues and receipts derived from or in connection with the home mortgages or from any notes or other obligations of lending institutions with respect to which the bonds have been issued.  The governing body may provide in the ordinance authorizing the bonds for the issuance of additional bonds to be equally and ratably secured by a lien upon these revenues and receipts.