Note 1 to paragraph (a): Persons whose property and interests in property are blocked pursuant to the authority of the UNPA include those listed on both OFAC's Specially Designated Nationals and Blocked Persons List (SDN List) and the Consolidated United Nations Security Council Sanctions List (see https://www.un.org) as well as persons listed on the SDN List for being owned or controlled by, or acting for or on behalf of, such persons.
Note 2 to paragraph (d): As of September 1, 2017, the U.S. Department of State has restricted the use of U.S. passports to travel into, in, or through North Korea. See 22 CFR 51.63 . U.S. nationals who wish to travel to or within North Korea for the extremely limited purposes that are set forth in federal regulations must apply for a passport with a special validation from the Department of State. See travel.state.gov for additional details.
31 C.F.R. §510.213