The County may also maintain roads that are within a "County Service Area" ["CSA"; see Government Code sections 25210.1-25210.90]. Formation must go through the Local Agency Formation Commission (LAFCo). A CSA is a special district of the state, but it is a "county dependent special district" because it is governed by the County Board of Supervisors. Formation can occur only in conjunction with approval of a special tax or parcel charge. The road must also be brought up to current road standards. The CSA is appropriate for larger geographic areas than would cover a PRD. The road must also be brought up to current road standards.