Initiative. Adds section 23 to Article XX of Constitution. Provides that upon initiative petition the legislative body of any city or county shall submit to qualified electors thereof, or of one or more precincts therein, question of prohibiting therein traffic in beverages containing more than one-half of one per cent of alcohol. Declares if majority voting on said question vote affirmatively it shall be unlawful, thirty days thereafter, to manufacture, sell, offer for sale, transport or possess therein such beverages, unless question be again similarly submitted at subsequent election and majority voting thereon vote in the negative