The health inspection agency shall conduct periodic inspections of any tattooing and/or body piercing establishment for the purpose of determining whether or not said establishment and the persons performing the art of tattooing and/or body piercing thereon are in compliance with all applicable health provisions contained within this article and other pertinent ordinances at least once each calendar year. It shall be unlawful for any person or operator of a tattooing and/or body piercing establishment willfully to prevent or restrain the health inspection agency from entering any licensed establishment where tattooing and/or body piercing is being performed for the purpose of inspecting said premises, after proper identification is presented to the operator.