Section 3321. Exempt distribution

1. The commissioner by regulation or
  ruling may exempt from the licensing requirements of this title:
    (a)  the  return  of  controlled  substances  to  a  manufacturer   or
  distributor by a practitioner or pharmacy;
    (b) the sale of controlled substances by a pharmacy or practitioner to
  a  pharmacy  or  practitioner for the immediate needs of the pharmacy or
  practitioner receiving such substances; and
    (c) the disposition of controlled substances by  a  person  in  lawful
  possession  thereof  who, not in the ordinary course of business, wishes
  to discontinue such possession.
    2. Records of such transactions shall be prepared and  maintained  and
  reports filed in such manner as the commissioner shall require.