California Code, Government Code - GOV § 51939.1

The provisions of Sections 51940 through 51947, inclusive, shall not apply to any of the other cities which has voted, pursuant to Section 51929.5, to retain its existing local governmental structure, or to any districts such as special assessment districts created by and governed by the legislative bodies of such other cities;  provided, however, that the Charter of the City-County of Sacramento shall have effect throughout the entire county with respect to county government powers and jurisdiction.