No action shall be brought questioning the legality of any contract, financing agreement, mortgage, trust indenture, proceeding, or bonds executed in connection with any project or improvements authorized by this article on and after thirty days from the effective date of the resolution or ordinance authorizing the issuance of such bonds.L. 67: p. 678, § 22. C.R.S. 1963: § 36-24-22. L. 73: p. 481, § 16.
Colorado Legal Code