Idaho Code § 50-2718
The resolution authorizing the issuance of any revenue bonds hereunder and the execution of an indenture as security therefor shall be published one (1) time in a newspaper of general circulation in the municipality. Any such indenture, or other instrument authorized in such resolution to be executed, may be incorporated as an exhibit to such resolution but need not be published as part of the resolution. For a period of thirty (30) days from the date of such publication any person in interest may file suit in any court of competent jurisdiction to contest the regularity, formality or legality of the proceedings authorizing the revenue bonds, or the legality of such resolution and its provisions or of the revenue bonds to be issued pursuant thereto and the provisions securing the revenue bonds. After the expiration of such thirty (30) day period no one shall have any right of action to contest the validity of the revenue bonds or of such proceedings or of such resolution or the validity of the pledges and covenants made in such proceedings and resolution and the revenue bonds and the provisions for their payment shall be conclusively presumed to be legal and no court shall thereafter have authority to inquire into such matters.
Idaho Code § 50-2718