父母綠卡麵試

父母綠卡麵試後，移民官給了一張單子，上麵寫著“An additional review of your case and /or background check is required to determine your eligibility”。並且告訴我們“Inquries will not be accepted until 180 days after your interview”。這種情況屬於正常嗎？

萬分感謝！