Section 1401 is named Nationals and U.S. citizens at birth.
What was it you said? Oh, yeah...you base a lot on what the name of a section is.
Here is the break down...
@USC : Title 8 - ALIENS AND NATIONALITY
@8 USC Chapter 12 - IMMIGRATION AND NATIONALITY
@8 USC Chapter 12, Subchapter III - NATIONALITY AND NATURALIZATION
@8 USC Part I - Nationality at Birth and Collective Naturalization
And waaaaay down the line is the section in question...
@8 USC Section 1401 - Nationals and citizens of United States at birth