Business and Professions Code § 2622

(a) A physical therapist shall be responsible for managing all aspects of the care of each patient as set forth in regulations promulgated by the board.

(b) A physical therapist shall not supervise more than two physical therapist assistants at one time to assist the physical therapist in his or her practice of physical therapy.

(c) A physical therapist may utilize the services of one aide engaged in patient-related tasks to aid the physical therapist in his or her practice of physical therapy.