You shouldn't freeze it because the VG will become rancid and oil changes characteristics if it's frozen then thawed, I assume you are stock piling thinking it might be banned? Don't worry even if it was the different ingredients will still be freely/commonly available. The worst that will probably happen is that a high tax will be put on the ejuice [ around 80% ] because if they can tax something the government will, it saves them having to find a job and earn an honest living. The average ejuice has well over a year shelf life if kept in a cool dark cupboard that could be easily doubled.