The Child Citizenship Act of 2000, which became effective on February 27, 2001, serves to facilitate the acquisition of U.S. citizenship of the foreign-born children of U.S. citizens – both biological and adopted – who did not acquire citizenship at birth. This act amended the provisions of Sections 320 and 322 of the Immigration and Nationality Act.
Section 320: Automatic Acquisition of U.S. Citizenship for Children Born Outside of the United States and Residing Permanently in the United States
The child must meet the following requirements:
Have at least one U.S. citizen parent by birth or naturalization;
Be under 18 years of age;
Live in the legal and physical custody of the U.S. citizen parent;
Be admitted as an immigrant for lawful permanent residence; and
If the child is an orphan, the adoption must be final. If the adoption must be finalized in the United States, citizenship is acquired when the adoption is finalized.