Business and Professions Code § 2630

It is unlawful for any person or persons to practice, or offer to practice, physical therapy in this state for compensation received or expected, or to hold himself or herself out as a physical therapist, unless at the time of so doing the person holds a valid, unexpired, and unrevoked physical therapist license issued under this chapter, except as authorized by subdivisions (c), (d), (e), and (g) of Section 2630.5.