(a)General - (1)Conditional residence based on family relationship. An alien seeking admission to the United States with an immigrant visa as the spouse or son or daughter of a United States citizen or lawful permanent resident shall be examined to determine whether the conditions of section 216 of the Act apply. If so, the alien shall be admitted conditionally for a period of 2 years. At the time of admission, the alien shall be notified that the alien and his or her petitioning spouse must file