Depends on how "live" you want it.
To keep most of the critters in it alive...
You need to keep the water somewhat moving, the temp above 70 but below 90, the salinity from 1.018-1.030. Avoid drastic changes.
I don't recommend the following but I will share some experience with how robust "live" rock is....
I had to store some "live" rock in a tank that was unheated but indoors with one small power head flowing, no lights except room lights, no filters, nitrates unbelievably high, topped off from time to time with some nasty chlorinated Detroit city water with salinity varying in the range above for over 10 months. When the rock was stored this way there were no corals (that I knew of) nor any snails (that I knew of) on the rock. I thought surely it was "dead" by the time I was able to do something with it.
The water was eventually changed, temp brought up to 78, powerheads added, lights turned on and... coralline survived, tons of small feather dusters lived (and appeared to flourish), vermatid snails flourished, peppermint snails survived, cerith snails survived, and a small colony of polyps did as well. Cheato survived. A watchmen goby also was hidden in the rock and lived too.
Bubble and turf algae also survived
The polyps were white as ghosts when I discovered them and figured they were goners.... Well they didn't and are thriving. Life is pretty miraculous and some things can surprisingly survive in pretty harsh conditions.
Not something I would do again or recommend but the situation was unavoidable and I am thankful that I didn't have a bunch of "base" rock at the end of it.