(1) Following the organization of the first board of county commissioners elected pursuant to a charter, the board of commissioners shall adopt an administrative code organizing the administration of the county government and setting forth the duties and responsibilities and powers of all county officials and agencies pursuant to the provisions of the charter.
(2) The administrative code shall be effective upon adoption or as otherwise provided therein, and all existing agencies shall assume the form, perform the duties, and exercise the power granted them under the administrative code and shall do so in the manner prescribed.