It is declared to be a policy of the State of North Carolina that, in order to safeguard the public health, safety, and welfare; to protect the public from being misled by incompetent, unscrupulous, and unauthorized persons and from unprofessional conduct on the part of qualified speech and language pathologists and audiologists and to help assure the availability of the highest possible quality speech and language pathology and audiology services to the communicatively handicapped people of this State, it is necessary to provide regulatory authority over persons offering speech and language pathology and audiology services to the public. (1975, c. 773, s. 1.)