Montana Title 7. Local Government § 7-12-4256. Decision of district court

(1) If upon the hearing the court shall find and determine that the requirements of 7-12-4241 through 7-12-4258 have been complied with and notice of the hearing duly given as required by law, it shall have power to examine and determine the regularity, legality, and validity of the proceedings relative to the issuance of the bonds and the levy of special assessments and the legality and validity of the bonds and the special assessment and may ratify, approve, and confirm the proceedings in whole or in part and enter its judgment or decree accordingly.

(2) If no appeal pursuant to 7-12-4257 is taken within the time provided for in 7-12-4257 or if the judgment or decree of the district court be affirmed upon such appeal, such judgment or decree shall be forever conclusive upon all the world as to the validity of the bonds and the special assessment, and the same shall never be called into question in any court of the state.