8 U.S.C. 1402 ) is not a United States citizen at birth under subsection (c), (d), or (g) of section 301 of the Immigration and Nationality Act (8 U.S.C. 1401 (c), (d), or (g)). (2) Transition period During the implementation of the first Articles of Free Association, an individual born in Puerto Rico to at least one parent who is a citizen of the United States shall be a United States citizen at birth under section 301 of the Immigration and Nationality Act ( 8 U.S.C. 1401 ) if otherwise eligible. (d) Travel and work authorization (1) Any person in the following categories may enter, lawfully engage in occupations, and establish residence as a nonimmigrant in the United States and its territories and possessions without regard to paragraphs (5)(A) and (7) of section 212(a) of the Immigration and Nationality Act ( 8 U.S.C. 1182(a)