I just got a new USA passport. I have 5 months left on my non-B extension in my old passport. Is it a legal requirement that I go to immigration to have the visa and extension transferred into the new passport or can I just wait until my next extension and have them put the new stamp in the new passport? I don't plan on leaving the country before then.

Thanks.

I did mine a month later without questions asked, but 5 months seems to be long. Better to go and do it, just in case you need to travel or such.