NOC still a requirements to transfer under your sponsorship. Well definitely she can come back anytime BUT not as husband visa instead under VFamily visit visa which will be renewable up to six months.

Still you to wait until to ban period is completed in order to transfer to husband visa.

However, if you know someone inside moi who is powerful enough (wasta) to cancel the Ban then its good for you.

One of my friend resigned w/o NOC /Ban and he able to come back and get another sponsor.