Sts. & Hy. Code, § 5628

As an alternative method of collection of the amount of the lien, the legislative body, after confirmation of the report of the superintendent of streets, may order the notice of lien to be turned over to the assessor and the tax collector of the city, whereupon it shall be the duty of those officers to add the amount of the assessment to the next regular bill for taxes levied against the lot or parcel of land. If city taxes are collected by the county officials, the notice of lien shall be delivered to the county auditor, who shall enter the amount thereof on the county assessment book opposite the description of the particular property and the amount shall be collected together with all other taxes thereon against the property. The notice of lien shall be delivered to the county auditor before the date fixed by law for the delivery of the assessment book to the county board of equalization.