(a) The examination provided for in § 20-27 shall consist of both a written and practical examination. The subjects of the written examination shall be as follows: Anatomy, physiology, symptomatology, histology, vertebral palpation, principles of chiropractic and adjusting, chemistry, hygiene, pathology, dietetics and diagnosis. The national board tests of the National Board of Chiropractic Examiners may be accepted as the written examination provided it includes physiotherapy. The practical examination shall require the candidate to demonstrate clinical competency in basic chiropractic principles and procedures, including orthopedics, neurology, diagnosis, x-ray, vertebral palpation and adjustment.

(b) Any chiropractor who has complied with the provisions of this chapter may:

(1) Practice chiropractic as defined in § 20-24, but shall not prescribe for or administer to any person any medicine or drug included in materia medica, except vitamins, or perform any surgery or practice obstetrics or osteopathy;

(2) Examine, analyze and diagnose the human living body and its diseases, and use for diagnostic purposes the x-ray or any other general method of examination for diagnosis and analysis taught in any school or college of chiropractic which has been recognized and approved by the State Board of Chiropractic Examiners;

(3) Treat the human body by manual, mechanical, electrical or natural methods, including acupuncture, or by use of physical means, including light, heat, water or exercise in preparation for chiropractic adjustment or manipulation, and by the oral administration of foods, food concentrates, food extracts or vitamins;

(4) Administer first aid and, incidental to the care of the sick, advise and instruct patients in all matters pertaining to hygiene and sanitary measures as taught and approved by recognized chiropractic schools and colleges.