My son, a minor, left USA alone and returned only after 367 days. At immigration, his passport was stamped 'ARC Advice I-407'. He was told by immigration officer that the next time he re-enters USA, his GreenCard will be withheld. Does this make any sense? Does it mean that he will not be allowed to re-enter the USA under ARC status again? Kindly let me know what action should I take as I still want my son to hold onto the GreenCard.