It shall be unlawful for any person to tattoo or offer to tattoo any
person. As used herein to "tattoo" means to insert pigment under the
surface of the skin of a human being, by pricking with a needle or
otherwise, so as to produce a permanent indelible mark or figure
visible on the skin. Provided, however, that the provisions hereof
shall not apply to any act of a licensed practitioner of the healing
arts performed in the course of his practice.