§ 8201. Definition of practice of speech-language pathology. The practice of the profession of speech-language pathology shall mean the application of principles, methods and procedures of measurement, prediction, non-medical diagnosis, testing, counselling, consultation, rehabilitation and instruction related to the development and disorders of speech, voice, swallowing, and/or language for the purpose of preventing, ameliorating or modifying such disorder conditions in individuals and/or groups of individuals.