C.R.S. § 29-14-107

No action or proceeding, at law or in equity, to review any acts or proceedings, or to question the validity or enjoin the performance of any act, or the issuance of any bond anticipation notes authorized by this article, or for any other relief against any acts or proceedings done or had under this article, whether based upon irregularities or jurisdictional defects, shall be maintained, unless commenced within thirty days after the performance of the act or the effective date of the legislative act complained of, or else be thereafter perpetually barred.