Cal. Rev. & Tax. Code § 7203.2

The sales and use tax ordinance of a county, city, city and county, or redevelopment agency adopted pursuant to this part, shall be deemed to adopt by reference the provisions of Sections 7202 to 7203, inclusive, as now in effect or as later amended, which are required to be included in the ordinance, regardless of whether or not the ordinance was adopted or amended, prior to or after the effective date of this section.