[Code of Federal Regulations] [Title 22, Volume 1] [Revised as of April 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 22CFR53.1] [Page 254] TITLE 22--FOREIGN RELATIONS CHAPTER I--DEPARTMENT OF STATE PART 53_PASSPORT REQUIREMENT AND EXCEPTIONS--Table of Contents Sec. 53.1 Passport requirement. Sec. 53.1 Passport requirement. 53.2 Exceptions. 53.3 Attempt of a citizen to enter without a valid passport. 53.4 Optional use of a valid passport. Authority: 8 U.S.C. 1185; Proc. 3004, 18 FR 489, 3 CFR, 1949-1953 Comp., p. 180. Source: 31 FR 13546, Oct. 20, 1966, unless otherwise noted. Under section 215(b) of the Immigration and Nationality Act (8 U.S.C. 1185(b), it is unlawful except as otherwise provided for any citizen of the United States to depart from or enter, or attempt to depart from or enter, the United States without a valid passport.