No person shall be prosecuted under this chapter if, after receipt of a hazardous substance, he or she can establish a guarantee or undertaking signed by, and containing the name and address of, the person residing in the United States from whom he or she received in good faith the hazardous substance, to the effect that the hazardous substance is not a misbranded hazardous substance or a banned hazardous substance within the meaning of these terms, as defined by this chapter.
Source:
Section 108270, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=108270..