31 C.F.R. § 510.206 : Money and Finance: Treasury — REGULATIONS RELATING TO MONEY AND FINANCE — OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY — NORTH KOREA SANCTIONS REGULATIONS — PROHIBITIONS — Prohibited exportation or reexportation of goods, services, or technology to North Korea

(a) The exportation or reexportation, directly or indirectly, from the United States, or by a U.S. person, wherever located, of any goods, services, or technology to North Korea is prohibited.
(b) The prohibitions in this section apply except to the extent provided in regulations, orders, directives, or licenses that may be issued pursuant to this part or pursuant to the export control authorities implemented by the U.S. Department of Commerce, and notwithstanding any contract entered into or any license or permit granted prior to the effective date.

31 C.F.R. §510.206

83 FR 9187, 3/5/2018