Title 16, Chapter 13, Section 50
(a) It is not necessary for the state to negate any exemption or
exception in this article in any complaint, accusation, indictment,
or other pleading or in any trial, hearing, or other proceeding
under this article. The burden of proof of any exemption or
exception is upon the person claiming it.
(b) In the absence of proof that a person is the duly authorized
holder of an appropriate registration or order form issued under
this article, he is presumed not to be the holder of the
registration or form. The burden of proof is upon him to rebut the
(c) No liability is imposed by this article upon any authorized
state, county, or municipal officer engaged in the lawful
performance of his duties.