It is unlawful to reuse any olive oil container, can, or drum for repacking any fixed oil intended to be used for food purposes, except on the premises of the processor or when a consumer fills a clean container from a sanitary olive oil dispenser at a retail outlet.
Source:
Section 112915, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=112915..