When the state asserts a violation of this chapter, the state need not negate any exemption or exception from the requirements of this chapter in any pleading, or in any trial, hearing, or other proceeding. The burden of proof with respect to any exemption or exception rests upon the person claiming its benefits.
Source:
Section 112260, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=112260..