Ind. Code § 36-7-15.3-20
Any action to contest the validity of bonds to be issued under this chapter may not be brought after the fifteenth day following:
(2) the publication one (1) time in a newspaper of general circulation published in the county of notice of the execution and delivery of the contract for the sale of bonds;
whichever occurs first.
As added by P.L.84-1987, SEC.14.