Mandatory certification
Trademark/title control legislation
Licensure
Mandatory registration
prohibits people who have not met education & entry level exam requirements from referring to themselves as OTs/OTAs
protects the public from uncertified people referring to themselves as OTs/OTAs; certification law may define OT services
offers the highest level of public protection from unlicensed practitioners
protects the public from unregistered persons representing themselves as OT/OTA and may provide similar services; law may define OT services