All barbers or beauticians must be examined by the public health department at least once in every 12 months. They will be given a certificate which must be kept on their person when working in a barber shop or beauty shop. No barber will be employed in a barbershop and/or no beautician will be employed in a beauty shop who does not have a valid certificate of health.History: Pub. Health Reg. 3, eff 16 Jul 64, § 3.