Part I - NATIONALITY AT BIRTH AND COLLECTIVE NATURALIZATION
- Section 1401 - Nationals and citizens of United States at birth
- Section 1401a - Birth abroad before 1952 to service parent
- Section 1401b - Repealed
- Section 1402 - Persons born in Puerto Rico on or after April 11, 1899
- Section 1403 - Persons born in the Canal Zone or Republic of Panama on or after February 26, 1904
- Section 1404 - Persons born in Alaska on or after March 30, 1867
- Section 1405 - Persons born in Hawaii
- Section 1406 - Persons living in and born in the Virgin Islands
- Section 1407 - Persons living in and born in Guam
- Section 1408 - Nationals but not citizens of the United States at birth
- Section 1409 - Children born out of wedlock