Colo. Rev. Stat. § 31-35-417
This part 4 shall operate to supply such legislative authority as may be necessary to validate any such securities issued and other contracts executed prior to March 13, 1962, of such municipalities and any acts and proceedings taken appertaining to the issuance of such securities or execution of other contracts by such municipalities or otherwise prior to said date which the general assembly could have supplied or provided for in the law under which such securities were issued or such other contracts were executed and such acts or proceedings were taken; but this part 4 shall be limited to the validation of such securities, other contracts, acts, and proceedings to the extent to which the same can be effectuated under the state and federal constitutions. This part 4 shall not operate to validate, ratify, approve, confirm, or legalize any bond or coupon, other contract, act, proceeding, or other matter, the legality of which is being contested, or inquired into in any legal proceeding now pending and undetermined and shall not operate to confirm, validate, or legalize any bond or coupon, other contract, act, proceeding, or other matter which, prior to March 13, 1962, has been determined in any legal proceeding to be illegal, void, or ineffective.
C.R.S. § 31-35-417
This section is similar to former § 31-35-417 as it existed prior to 1975.