Tex. Occupations Code § 454.005

(a) This chapter does not apply to a holder of a license issued by another state agency who is performing health care services within the scope of the applicable licensing act.

(b) The licensing provisions of this chapter do not apply to:

(1) an occupational therapy aide assisting a license holder under this chapter;

(2) a person engaged in a course of study leading to a degree or certificate in occupational therapy at an accredited or approved educational program if:

(A) the activities and services constitute a part of a supervised course of study; and

(B) the person is designated by a title that clearly indicates the person's status as a student or trainee;

(3) a person fulfilling the supervised field work experience requirements of Section 454.203, if those activities and services constitute a part of the experience necessary to meet the requirement of that section;

(4) an occupational therapist performing a special project in patient care while working toward an advanced degree from an accredited college or university;

(5) an occupational therapist or occupational therapy assistant who does not live in this state and who:

(A) is licensed by another state or who meets the requirements for certification established by the National Board for Certification in Occupational Therapy as an occupational therapist registered (OTR) or a certified occupational therapy assistant (COTA); and

(B) comes into this state for not more than four consecutive months to:

(i) provide or attend an educational activity;

(ii) assist in a case of medical emergency; or

(iii) engage in a special occupational therapy project; or

(6) a qualified and properly trained person acting under a physician's supervision under Section 157.001.