8 US Code § 1101(a)(22)(B)

The term “national of the United States” means (A) a citizen of the United States, or (B) a person who, though not a citizen of the United States, owes permanent allegiance to the United States.

Refers to a specific section of the United States Code that pertains to the definition of the term "national of the United States." This section specifically defines a national of the United States as a person who, though not a citizen of the United States, owes permanent allegiance to the United States. This may include individuals born in American Samoa or Swains Island.