Idaho Code § 42-3110
The board, duly organized by order of the director shall within a reasonable time after their appointment, qualification and organization, file, in the district court of the county in which their office is located, a petition praying that all of the proceedings prior thereto may be examined and approved by the court.
The petition shall set forth in detail the proceedings taken prior to the entry of the order organizing the district, and the subsequent appointment and organization of the board. Upon the filing of the petition the court may require such notice to be given of the hearing on said petition as in his discretion he deems necessary and proper. At the hearing the court shall require that evidenciary [evidentiary] proof be presented of all of such proceedings taken pursuant to the rules of evidence.
In the event that the court finds that all proceedings were in conformity with this act, and that all procedures were followed, and that said district was organized in conformity with this act, then the court shall make its findings of fact, conclusions of law and order confirming these proceedings.
The order of the court entered upon the hearing of any petition shall be conclusive as the regularity of the proceedings unless appealed from within thirty (30) days after the entry of such order, provided that upon such appeal no bond shall be required, except for costs of the appeal, and no stay shall be allowed pending the appeal.
Idaho Code § 42-3110