A person may not practice occupational therapy or hold out as an occupational therapist, or as being able to practice occupational therapy, or to render occupational therapy services in this state unless that person is licensed under this chapter. Only individuals may be licensed under this chapter. An individual licensed under this chapter as an occupational therapist may use the title “occupational therapist” and the abbreviation “OT/L” or other designation approved by the board. An individual licensed under this chapter as an occupational therapy assistant may use the title “occupational therapy assistant” and the abbreviation “OTA/L” or other designation approved by the board. No other individual may use these names or abbreviations.