31 CFR § 510.405 - Exportation and reexportation of goods, services, or technology.
(a) The prohibition on the exportation and reexportation of goods, services, or technology contained in § 510.206 applies to services performed on behalf of a person in North Korea or the Government of North Korea or where the benefit of such services is otherwise received in North Korea, if such services are performed:
(1) In the United States; or
(2) Outside the United States by a U.S. person, including by a foreign branch of an entity located in the United States.
(b) The benefit of services performed anywhere in the world on behalf of the Government of North Korea is presumed to be received in North Korea.
(c) The prohibitions contained in § 510.201 apply to services performed in the United States or by U.S. persons, wherever located, including by a foreign branch of an entity located in the United States:
(1) On behalf of or for the benefit of the Government of North Korea, the Workers' Party of Korea, or any other person whose property and interests in property are blocked pursuant to § 510.201(a); or
(2) With respect to property interests of the Government of North Korea, the Workers' Party of Korea, or any other person whose property and interests in property are blocked pursuant to § 510.201(a).
(d)
(1) For example, U.S. persons may not, except as authorized by or pursuant to this part, provide legal, accounting, financial, brokering, freight forwarding, transportation, public relations, or other services to any person in North Korea or to the Government of North Korea, the Workers' Party of Korea, or any other person whose property and interests in property are blocked pursuant to § 510.201(a).
(2) For example, a U.S. person is engaged in a prohibited exportation of services to North Korea when it extends credit to a third-country firm specifically to enable that firm to manufacture goods for sale to North Korea or the Government of North Korea.
See §§ 510.507 and 510.509 on licensing policy with regard to the provision of certain legal and emergency medical services.