C.R.S. § 31-35-706

The rates and charges so established shall be annual charges and shall be continuing annual charges from year to year until such ordinance is amended or repealed. The use of said sewerage system on or after the passage of said ordinance shall be conclusive evidence of the assent of the owner of the property to the provisions of said ordinance and of the acceptance of such service on the conditions and terms imposed thereby not in conflict with this part 7.