Notwithstanding any other provision of law, any county currently operating an institution established under s. 49.70, 49.71, 49.72, 51.08, or 51.09 may, by resolution of the county board or, in Milwaukee County for institutions providing mental health treatment, the Milwaukee County mental health board, designate such institution or distinct part of such institution as a facility to be operated under s. 50.02, 50.03 or 50.33. Any county institution or part thereof, where so designated, shall be required to meet those licensure standards established by the department for the type of facility designated by the county. Any designation under this section may be made only if such designation will not result in any additional cost to the state.