9 GCA § 67.505.1: Proof of Exemption and Exception Upon Defendant: Failure to Show Registration Cause for Forfeiture.

(a) It shall not be necessary for the government to negate any exemption or exception in this Act in any complaint, information, indictment or other pleading or in any trial, hearing or other proceeding under this Act. The burden of proof of any such exemption or exception shall be upon the person claiming its benefit.

(b) In the absence of proof that a person is the duly authorized holder of an appropriate registration or order form issued under this Act, he shall be presumed not to be the holder of such registration or form, and the burden of proof shall be upon him to rebut such presumption.