Can a B&M shop take their wholesale/bulk bought, 0% 'house juice' and add nicotine to individually purchased bottles? I can't seem to find anything definitive. I've been in two different shops in the last week. One mixed the nic right there at the counter...the other said you couldn't do that and sold me a premixed 3%, 'submitted' recipe, bottle. Where is that information? Preferably in plain English.