Section 32-11-652 - Optional filing of claim of lien(1) The board may, but is not required, in any assessment resolution or in any resolution supplemental thereto, provide that the secretary, within thirty days after the expiration of the thirty-day payment period specified in section 32-11-642, shall make out, sign, attest with the seal of the urban district, and file for record in the office of the county clerk of each county in which is located assessable property pertaining to any improvement district, a claim of lien for the unpaid amount due and assessed against each tract on the assessment roll for the improvement district.(2) When a claim of lien is so filed and any assessment pertaining thereto is paid in full, the secretary shall release the lien against any specific tract either by entering and signing a receipt of payment upon the margin of the record thereof or by filing for record in the office of the county clerk and recorder a separate release wherein payment of the assessment, principal, interest, and any penalty is recited.L. 69: p. 804, § 165. C.R.S. 1963: § 89-21-165.