Indiana Code Title 5. State and Local Administration § 5-1.5-9-1

Sec. 1. (a) No action to contest the validity of any bonds or notes of the bank to be sold at public sale may be brought after the fifteenth day following the first publication of notice of the sale of the bonds or notes.  No action to contest the validity of any bond sale under this chapter may be brought after the fifth day following the bond sale.

(b) If bonds or notes are sold at private sale, the bank may publish notice of the execution of the contract of sale of the bonds or notes one (1) time in two (2) newspapers published and of general circulation in the city of Indianapolis.  If notice is published as permitted in this subsection, no action to contest the validity of such bonds or notes sold at private sale may be brought after the fifteenth day following the publication of notice of the execution of the contract of sale pertaining to the bonds or notes.

(c) If an action challenging the bonds or notes of the bank is not brought within the time prescribed by subsection (a) or (b), whichever is applicable, all bonds or notes of the bank shall be conclusively presumed to be fully authorized and issued under the laws of the state, and a person or a qualified entity is estopped from questioning their authorization, sale, issuance, execution, or delivery by the bank.

(d) Insofar as the provisions of this article are inconsistent with the provisions of any other law, general, special, or local, the provisions of this article shall be controlling.