(b) a person acting in accordance with an authority granted by the Secretary
of the Department of Health where the Secretary is satisfied that the
possession of the prohibited drug is for the purpose of scientific research,
instruction, analysis or study,
(b1) a person acting in accordance with a
direction given by the Commissioner of Police under section 39Q,
(c) a person
for or to whom the prohibited drug has been lawfully prescribed or supplied,
or
(d) a person who--
(i) has the care of, or is assisting in the care of,
another person for or to whom the prohibited drug has been lawfully prescribed
or supplied, and
(ii) has the prohibited drug in his or her possession for
the sole purpose of administering, or assisting in the self-administration of,
the prohibited drug to the other person in accordance with the prescription or
supply.