QuoteThe regulations establish more specifically that deliveries "may be made only in person by enclosed motor vehicle," and that cannabis goods "may not be visible to the public during deliveries

Quotethe booming cannabis delivery industry must operate within certain parameters, including by making sure products are hidden en route and generally keeping a low profile

https://www.forbes.com/sites/janetwburns/2017/09/14/california-to-ban-drones-and-bots-from-delivering-legal-cannabis/#6a6d21039c78


^{Debbie says:} California's license plate scanners must be top-notch.

These guys just love making RULES 

>Rules

I wouldn't be worried about the rules as much as the LISTS current, common-place technology can compile.  Within a year, Calif -or US AG Sessions- could have a nice database of marijuana users.