(a) A holder of a valid license or certificate permitting the practice of law or medicine or any of their branches, who is actually engaged in practicing the profession, or a holder of the requisite academic degree for the general practice of medicine who is engaged in an internship or resident program pursuant to the practice of his profession, or an employee employed and engaged as a teacher in the activity of imparting knowledge, is excepted from the salary or fee requirement. This exception applies only to the traditional professions of law, medicine, and teaching and not to employees in related professions which merely serve these professions.
(b) In the case of medicine:
(1) The exception applies to physicians and other practitioners licensed and practicing in the field of medical science and healing or any of the medical specialities practiced by physicians or practitioners. The term
(2) Physicians and other practitioners included in paragraph (b)(1) of this section, whether or not licensed to practice prior to commencement of an internship or resident program, are excepted from the salary or fee requirement during their internship or resident program, where such a training program is entered upon after the earning of the appropriate degree required for the general practice of their profession.
(c) In the case of medical occupations, the exception from the salary or fee requirement does not apply to pharmacists, nurses, therapists, technologists, sanitarians, dietitians, social workers, psychologists, psychometrists, or other professions which service the medical profession.