A.  Within thirty days after publication of the notice of intention to issue notes, any person in interest may contest the legality of the resolution, any provision of the notes to be issued pursuant to it, the provisions securing the notes, and the validity of all other provisions and proceedings relating to the authorization and issuance of the notes, by filing, answering, or intervening into a motion for judgment as provided for at La. Rev. Stat. 13:5121 et seq.

B.  If no action or proceeding is instituted within this thirty-day period, no person may contest the validity of the notes, the provisions of the resolution pursuant to which the notes were issued, the security of the notes, or the validity of any other provisions or proceedings relating to their authorization and issuance, and the notes shall be presumed conclusively to be legal.  Thereafter, no court shall have authority to inquire into such matters.

C.  If an action or proceeding is instituted within this thirty-day period, a final decree or judgment of any court of competent jurisdiction shall constitute a permanent injunction against the institution by any person of any action or proceeding contesting the validity of the notes or any other matter adjudicated or which might have been called into question in such proceedings.  Thereafter, no court, regardless of whether the thirty-day period shall have expired, shall have authority to inquire into such matters.

Acts 1991, No. 827, §1.