(1) Nothing in this part 2 authorizes a physical therapist assistant to perform any of the following acts:
(a) Practice of medicine, surgery, or any other form of healing except as authorized by this part 2; or
(b) Use of roentgen rays and radioactive materials for therapeutic purposes, use of electricity for surgical purposes, or diagnosis of disease.
(2) A physical therapist assistant shall not practice physical therapy unless the assistant works under the supervision of a licensed physical therapist.