If I'm reading this all correctly, the tanks themselves don't need to be locked when stored outdoors, provided there is sufficient security to prevent unwanted access. I.e. a fence/border wall with appropriately beefy locks would suffice? How would you convey the spirits back indoors for processing? I'm assuming you can't have a tank outside with a locked valve and piping to an indoor bottling room, for example? Also, where does someone find locked (with a key) valves? I don't think I've ever came across them.
Thanks for the lively discussion on codes. Love this industry