This chapter does not apply to:
(1) a person licensed in this state as a physician, chiropractor, occupational therapist, physical therapist, nurse, cosmetologist, or athletic trainer or as a member of a similar profession subject to state licensing while the person is practicing within the scope of the license;
(2) a school approved by the Texas Education Agency or otherwise approved by the state; or
(3) an instructor otherwise approved by the state to teach in an area of study included in the required course of instruction for issuance of a massage therapist license.