So do all juices need to be steeped or aired unless it is stated that it is BRV (bottled ready to vape)? Or, conversely, will a bottle that needs to be steeped say so?
Only the perfumy, alcoholy, mediciny tasteing ones need to breath (aired). Regardless of when made. Sometimes these may actually be steeped. A juice may have been capped and sealed trapping the alcohol in the liquid. As an example, a juice can be made in China, wait in a warehouse for a week, shipped to a vender taking 2-3 weeks transport to a store in the states where it sits on their shelf for another week or 2 until it is sold to the user. At 5 weeks old, the flavors have mixed but the alcohol is still trapped in the bottle.
From what I've seen, no one ever tells you that you need to breath their liquid.
1) imported juices usually have enough steep time due to transport. Venders that say "pre-steeped" are usually steeped also.
2) known "made to order" liquids can benefit from at least 1 week steeping.
Everything else that falls between 1 and 2 is up in the air, and few venders actually say where they are on this. They may give a suggested steep time, but usually they don't.
I stay on the safe side and let everything sit for a week at least.