California Code, Elections Code - ELEC § 9281

If no other method is provided by general law, or, in the case of a chartered city, by the charter or by city ordinance, arguments for and against any city measure may be submitted to the qualified voters of the city pursuant to this article. If a method is otherwise provided by general law, or, in the case of a chartered city, by charter or city ordinance, for submitting arguments as to a particular kind of city measure, that method shall control.