It is the purpose of this chapter to provide for the adoption and administration of zoning laws, ordinances, rules and regulations by counties and cities, as well as to implement such general plan as may be in effect in any such county or city. Except as provided in Article 4 (commencing with Section 65910) and in Section 65913.1, the Legislature declares that in enacting this chapter it is its intention to provide only a minimum of limitation in order that counties and cities may exercise the maximum degree of control over local zoning matters.