The assessment and tax collection duties, and the collection of assessments levied for municipal improvements, now performed by the assessor and the tax collector of the city, are transferred to the assessor and the tax collector of the county for the purpose of assessment and collection of and for ad valorem property taxes that become a lien after the adoption of the ordinance codified in this chapter, and the collection of assessments for municipal improvements becoming due and payable on and after July 1, 1965. (Ord. 216 § 2, 1965).