19 CFR § 148.102 - Flat rate of duty.
(a) Generally. The rate of duty on articles accompanying any person, including a crewmember, arriving in the United States (exclusive of duty-free articles and articles acquired in American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, or the Virgin Islands of the United States) shall be 4 percent, effective January 1, 2001, and 3 percent, effective January 1, 2002, of the fair retail value in the country of acquisition.
(b) American Samoa, Guam, the Northern Mariana Islands, and the Virgin Islands. The rate of duty on articles accompanying any person, including a crewmember, arriving in the United States directly or indirectly from American Samoa, Guam, the Commonwealth of the Northern Mariana Islands, or the Virgin Islands of the United States (exclusive of duty-free articles), acquired in these locations as an incident of the person's physical presence there, shall be 2 percent, effective January 1, 2001, and 1.5 percent, effective January 1, 2002, of the fair retail value in the location in which acquired.