§ 3328. Exemptions from title. The following persons engaging in the
following activities shall be exempt from the provisions of this title:

1. A practitioner lawfully administering, dispensing, or prescribing a
controlled substance in the course of his professional practice to an
ultimate user for a recognized medical purpose;

2. A licensed manufacturer engaged in research upon non-human subjects
or chemical analysis conducted on the premises specified in the
manufacturer's license;

3. A licensed distributor engaged in quality control analysis at the
premises specified in his license.

4. A practitioner or patient participating in a clinical research
program on the therapeutic use of marijuana or tetrahydrocannabinols.
(a) Each such clinical research program shall have received protocol
approval from the United States Food and Drug Administration, shall
possess an effective investigational new drug application and shall have
been registered by the Drug Enforcement Administration, United States
Department of Justice.

(b) Each such clinical research program authorized under the
provisions of article thirty-three-A of this chapter.