California Code, Government Code - GOV § 45000

It is the intent of this chapter to enable the legislative body of any city to adopt such a personnel system, merit system, or civil service system as is adaptable to the size and type of the city.  The system may consist of the mere establishment of minimum standards of employment and qualifications for the various classes of employment, or of a comprehensive civil service system, as the legislative body determines for the best interests of the public service.