Cal. Pub. Res. Code § 40970

It is the intent of the Legislature in enacting this article to authorize cities and counties to form regional agencies to implement this part in order to reduce the cost of reporting and tracking of disposal and diversion programs by individual cities and counties and to increase the diversion of solid waste from disposal facilities. It is further the intent of the Legislature that this part be binding upon, and enforceable against, the individual cities and counties which are member agencies of the regional agency. It is not the intent of the Legislature in enacting this article to diminish the responsibility of individual cities and counties to implement source reduction, recycling, and composting programs as required by this part.