22 C.F.R. § 53.1 Passport requirement.
Title 22 - Foreign Relations
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.
Title 22: Foreign Relations
PART 53—PASSPORT REQUIREMENT AND EXCEPTIONS
§ 53.1 Passport requirement.
