According to the U.S. State Department’s website, “A person born abroad in wedlock to a U.S. citizen and an alien acquires U.S. citizenship at birth if the U.S. citizen parent has been physically present in the United States or one of its outlying possessions prior to the person’s birth for the period required by the statute in effect when the person was born. For birth on or after November 14, 1986, the U.S. citizen parent must have been physically present in the United States or one of its outlying possessions for five years prior to the person’s birth, at least two of which were after the age of fourteen.”