[Code of Federal Regulations] [Title 22, Volume 1] [Revised as of April 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 22CFR51.40] [Page 261] TITLE 22--FOREIGN RELATIONS CHAPTER I--DEPARTMENT OF STATE PART 51--PASSPORTS--Table of Contents Subpart C--Evidence of U.S. Citizenship or Nationality Sec. 51.40 Burden of proof. The applicant has the burden of proving that he or she is a national of the United States. [66 FR 29907, June 4, 2001]