Hi,
if a P/R is going to be out of the us more than 12mths he/she must file a 1-131 form this is a re-entry permit....cost$170.00 this will cover you and up to, for 2yrs outside the usa
if your outside the us tho then this will break up any intent to become a usc in the future..as to become a usc, you must be living in the us for 3yrs without going over that 1yr you intend to stay..
Saying all that myself had p/r status back 17mths ago and left the usa for 8mths and on the return back to the us they at p.o.e pulled me to the office for 2hrs asking me why i was out for so long...as i told them i had a family death (my sister) and also had to tie up depts ect....but after long time they let me in.....but was told to file i-131 form
i contacted dhs and they said they have no right in holding you as i was not out of the usa more than 1yr and showed my P/R card and D/L
But yep even tho dhs say one thing P.O.E has the power to do the other even if not outside the us more than a 1 yr...
I stayed in the usa for 3wks as still i have loose ends as i was going to sell home but that went paired shaped, so im back in the uk now and have intention of renting home and getting back to the usa within a good time frame this time...(not to leave it so long like before)
On dep the us me and wife spoke to P.O.E officers and told them what happened they said more or less not to stay out so long next time, of which i wont do, because as soon as i can apply for usc myself after 3yrs of which ive done almost half that time now and dont want to blow it...
Im not sure if they can take into account my 8mths away from my time but the law states if im outside the usa for more than a yr then that time wont be incl in the 3yrs...
Another point ...if your 0utside the usa for 4 out of the 5 yrs of being a P/R then then the dhs/uscis/ins can take your P/R off you....
This is why myself would like a usc so then proberly i wouldnt have any problems with P.O.E AGAIN ! AGAIN, AGAIN...Thank God
Anyway best advise for you to be safe is apply for a i-131re-entry permit which covers you for 2 yrs....but apply before you leave...
I hope this info helps you and others..
Best wishes
QUOTE(warlord @ Aug 20 2007, 01:51 PM)

Yes you will need to maintain US residency. If you did move, then they would most likely abandon your GC. Before 6 months the USC has to prove you didn't meet residency requirements. After 6 months you have to prove to the USC that you did maintain the residency requirements and anything over a year will most likely be considered abandoned.
Even after 6 months you'd need to apply for a re-entry permit as well, however that's not all you'll need. As mentioned you need to show and prove you were comming back, house/apt, bills paid etc. Best is to decline the job until after you become a USC...