Basically speaking if you are called back (or even offered work elsewhere) and you turn it down you just blew it and won't get further UC. (Or if you are not actively seeking work you can also blow it -or if you are unavailable)
States vary--but if its even close you need to accept or lose UC...for that matter they could offer you a nonteaching job on night shift at say 80% of your prior pay and if you said no I'd give odds you'd lose UC.
With the convoluted way pensions and tenure work in many states--I'd go back if it was 80% and a night slot teaching juvy hall release students --unless I had a lot better job on platter. Tenure become akin to an economic property right and I think NJ pension rules are about as liberal as they get!