Code of Federal Regulations Title 31. Money and Finance–Treasury § 31.536.406 Provision of services

(a) The prohibitions on transactions contained in § 536.201 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:

(b) 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 a specially designated narcotics trafficker.