(a) In a civil action or administrative proceeding under this chapter, a person claiming an exemption, exception, preemption, or exclusion has the burden to prove the applicability of the claim.
(b) In a criminal proceeding under this chapter, an exemption, exception, preemption, or exclusion claimed by the defendant is an affirmative defense. In this subsection, “affirmative defense” has the meaning given in AS 11.81.900.