No individual or entity shall operate a barbershop, cosmetology salon, nail care salon, waxing salon, tattoo parlor, body-piercing salon, ear-piercing salon, or esthetics spa without a valid license issued by the Board. The provisions of this section shall not apply to a licensed barber, cosmetologist, nail technician, waxing technician, tattooer, body-piercer, ear-piercer, or esthetician who does not have an ownership interest in a licensed barbershop, cosmetology salon, nail care salon, waxing salon, tattoo parlor, body-piercing salon, ear-piercing salon, or esthetics spa in which he is employed.