Cal. Gov. Code § 51941

Upon reorganization every special district within the county or exercising all or any part of its jurisdiction or powers within the county except as may be otherwise provided in the charter, is deemed dissolved. The functions of all such dissolved districts shall be assumed by the city-county government, except as may be otherwise provided in the charter. The provisions of Section 51942, 51943, 51944, and 51945 shall be applicable to the merger of every such special district merged with the city-county pursuant to this charter.