Cal. Public Resources Code § 41903

A city or county may assess special fees of a reasonable amount on the importation of waste from outside of the county to publicly owned or privately owned facilities. No city or county shall export solid waste to any other jurisdiction unless the exporting city or county has, within one year following the date specified in Section 41791 or a later date established or permitted by the board, an approved city or county household hazardous waste element and a source reduction and recycling element which have both been implemented, or have submitted a countywide integrated waste management plan, and is in compliance with it, provided, however, that, until one year following the date specified in Section 41791 or a later date established by the board, nothing herein shall be construed as prohibiting the export of solid waste. The board may waive the requirements of this section if the board determines that all additional reasonable source reduction and recycling programs are being implemented in the city or county or if the board determines that the system to export waste supports or enhances the city or county source recovery and recycling element.