31 CFR § 515.306 - Specially designated national.
(a) The term specially designated national shall mean:
(1) Any person who is determined by the Secretary of the Treasury to be a specially designated national,
(2) Any person who on or since the “effective date” has acted for or on behalf of the Government or authorities exercising control over a designated foreign country, or
(3) Any partnership, association, corporation or other organization which on or since the “effective date” has been owned or controlled directly or indirectly by the Government or authorities exercising control over a designated foreign country or by any specially designated national.
(b) [Reserved]
Please refer to the Office of Foreign Assets Control's Specially Designated Nationals and Blocked Persons List (“SDN List”) for a non-exhaustive listing of persons determined to fall within this definition, whose property and interests in property therefore are blocked pursuant to this part. The SDN List entries for such persons include the identifier “[CUBA].” The SDN List is accessible through the following page on the Office of Foreign Assets Control's Web site: http://www.treasury.gov/sdn. Additional information pertaining to the SDN List can be found in appendix A to this chapter. Section 501.807 of this chapter sets forth the procedures to be followed by persons seeking administrative reconsideration of their designation or that of a vessel as blocked, or who wish to assert that the circumstances resulting in the designation are no longer applicable.