The structure of government in Los Angeles County is very complex, with 500 political districts having varying responsibilities and constituencies. These are sometimes referred to as "separate but related agencies." They may be city councils, school boards, transportation agencies, water districts, air quality districts, cemetery districts, sanitation boards, or a myriad of other special districts. Many are headed by elected officials, while others have appointed members. Additionally, within the County government, there are 37 departments and approximately 200 committees and commissions. Government of the people, by the people and for the people is an appropriate description for L.A. County.