The following are exempt from regulation under this chapter:
(1) a bookstore, movie theater, or video store, unless that business is an adult bookstore, adult movie theater, or adult video store under Section 243.002;
(2) a business operated by or employing a licensed psychologist, licensed physical therapist, licensed athletic trainer, licensed cosmetologist, or licensed barber engaged in performing functions authorized under the license held; or
(3) a business operated by or employing a licensed physician or licensed chiropractor engaged in practicing the healing arts.