The governing authority of the county of the client's residence shall arrange for all required transportation of the client. The type of vehicle employed shall be determined by the governing authority of the county, provided that, whenever possible, marked vehicles normally used for the transportation of criminals or those accused of crimes shall not be used for the transportation of clients. The court, upon the request of the community mental retardation program, shall order the sheriff to transport the client in such manner as the client's condition demands. At any time such community mental retardation program is satisfied that the client can be transported safely by family members or friends, such private transportation shall be encouraged and authorized. No female client shall be transported at any time without another female in attendance who is not a client, unless such female client is accompanied by her husband, father, adult brother, or adult son.