c) with respect to the United States,
(i) the customs territory of the United States, which includes the 50 states, the District of Columbia and Puerto Rico,
(ii) the foreign trade zones located in the United States and Puerto Rico, and
(iii) any areas beyond the territorial seas of the United States within which, in accordance with international law and its omestic law, the United States may exercise rights with respect to the seabed and subsoil and their natural resources.
위의 (iii) 의 규정은 도서가 아닌 해저의 자원에 관하여 미국이 영유권이 있는 지점을 말하므로 괌은 TN 이 제외 된다고 생각합니다. 더 research 를 해서 확인이 되면 수정하겠습니다.