While registration as an apprentice barber is in effect, the registration authorizes the individual to learn to practice barbering or to learn to provide barber–stylist services: in a: barbershop that holds a barbershop permit; or beauty salon that holds a beauty salon permit; and under the supervision of a master barber. An apprentice barber shall practice barbering or provide barber–stylist services only at the barbershop or beauty salon with a barbershop permit issued under § 5–504 of this article. An apprentice barber may only be paid for work authorized under this section performed while assisting a master barber in starting or completing an operation.