No provision of this chapter shall be construed to prohibit a student of chiropractic enrolled in an educational program of chiropractic in a regionally accredited chiropractic college or institution approved solely for the purposes of this section by the Board of Chiropractic Examiners with the consent of the Commissioner of Public Health, from performing, under the direct supervision of a licensed chiropractor, such work as is incidental to his course of study at such institution.