Immigration Lawyer's website:
http://www.americanlaw.com/revalid.html
USCIS's website:
http://uscis.gov/lpBin/lpext.dll/inserts/22cfr/22cfr-1/22cfr-673/22cfr-1255/22cfr-1270?f=templates&fn=document-frame.htm#22cfr-22cfrsec41112
http://www.americanlaw.com/revalid.html
USCIS's website:
http://uscis.gov/lpBin/lpext.dll/inserts/22cfr/22cfr-1/22cfr-673/22cfr-1255/22cfr-1270?f=templates&fn=document-frame.htm#22cfr-22cfrsec41112