Cal. Gov. Code § 54900
When there is a change in boundaries (1) of a city, (2) of a district, or special zone thereof, within a city the tax levy of which is carried on the regular city assessment roll, or (3) of a district, or special zone thereof, the tax or special assessment levy of which is carried on the regular county assessment roll, or when a city or any district, or special zone thereof, is created the tax or special assessment levy of which is carried on the regular county assessment roll, or when a district previously levying and collecting taxes or special assessments based upon its own assessment utilizes the regular city or county assessment roll, the tax or assessment levying authority of the city or district shall file or cause to be filed a statement of the creation or change, or of the exterior boundaries of the district and the special zones therein newly utilizing the regular city or county assessment roll. The city or district shall prepare the statement and forward it to the tax or assessment levying authority for filing.
Any filing as required by this section by the executive officer of a local agency formation commission pursuant to Section 57204 shall be deemed to satisfy the requirements of this chapter.
Ca. Gov. Code § 54900