Sections 50-1725 through 50-1727, inclusive, Idaho Code, are incorporated herein by this reference as though set out at length herein. Without changing the intent or effect of the incorporated sections, the following paragraph of this section shall be an additional limitation of any or all actions to test the validity of this chapter.
If an ordinance be adopted establishing the assessment or assessments pursuant to this chapter, such ordinances shall be final and conclusive against all persons, unless an action attacking the validity of any part or all of this law or any or all of the acts or matters contemplated by this law shall be commenced in a court of competent jurisdiction within thirty (30) days after the adoption of the assessment ordinance. Thereafter, any such action shall be perpetually barred and the organization of said district, the assessment levied pursuant thereto, or any other act or matter contemplated by this statute shall not be directly or collaterally questioned in any suit, action, or proceeding. Any such action shall be given preference over all civil cases pending in the courts of the state except proceedings relating to acts of eminent domain by cities and actions of forcible entry and detainer. If such action is unsuccessful, the courts may order the plaintiff to pay the costs thereof, and, in its discretion, may require a bond in a sufficient amount to cover such costs at the commencement of such action. The burden of proof to show that such special assessment or part thereof invalid, inequitable or unjust shall rest upon the party who brings such suit.