Tex. Occupations Code § 453.004

(a) This chapter does not restrict the holder of a license issued by another state agency from performing health care services within the scope of the applicable licensing act if the license holder:

(1) does not represent to another that the license holder is a physical therapist;

(2) does not violate Sections 453.201(a) and (c) and 453.304; and

(3) practices strictly in conformity with the statutes and rules relating to the license holder's license.

(b) This chapter does not apply to:

(1) a physical therapy aide;

(2) a physical therapy student or physical therapist assistant student:

(A) participating in an accredited physical therapy or physical therapist assistant educational program; and

(B) being supervised by a license holder under this chapter;

(3) a student:

(A) participating in an accredited allied health science program leading to licensure by another state agency; and

(B) being supervised by properly licensed, certified, or registered personnel;

(4) a physical therapist who is licensed in another jurisdiction of the United States if the person is engaging, for not more than 90 days in a 12-month period and under the supervision of a physical therapist licensed in this state, in a special project or clinic required for completion of a post-professional degree in physical therapy from an accredited college or university, and the person notifies the board of the person's intent to practice in this state; or

(5) a person who practices physical therapy or as a physical therapy assistant and who is:

(A) practicing physical therapy in the United States armed services, United States Public Health Service, or Veterans Administration in compliance with federal regulations for licensure of health care providers;

(B) licensed in another jurisdiction of the United States or credentialed to practice physical therapy in another country if the person:

(i) is teaching, demonstrating, or practicing physical therapy in an educational seminar in this state for not more than 60 days in a 12-month period, and the person notifies the board of the person's intent to practice in this state; or

(ii) by contract or employment, is practicing physical therapy in this state for not more than 60 days in a 12-month period for an athletic team or organization or a performing arts company temporarily competing or performing in this state; or

(C) licensed in another jurisdiction of the United States, if the person notifies the board of the person's intent to practice in this state, and:

(i) is practicing physical therapy for not more than 60 days during a declared local, state, or national disaster or emergency; or

(ii) is displaced from the person's residence or place of employment due to a declared local, state, or national disaster and is practicing physical therapy in this state for not more than 60 days after the date the disaster is declared.