CFR > Title 22 - Foreign Relations > CHAPTER I—DEPARTMENT OF STATE > SUBCHAPTER F—NATIONALITY AND PASSPORTS (parts 50 to 53) > PART 53—PASSPORT REQUIREMENT AND EXCEPTIONS > 53.1—Passport requirement; definitions.

53.1—Passport requirement; definitions.

(a) It is unlawful for a citizen of the United States, unless excepted under 22 CFR 53.2, to enter or depart, or attempt to enter or depart, the United States, without a valid U.S. passport.
(b) For purposes of this part “United States” means “United States” as defined in section 215(c) of the Immigration and Nationality Act of 1952, as amended (8 U.S.C. 1185(c) ).