(a) The prohibitions contained in Sec. 598.203 apply to services performed by U.S. persons, wherever located:
(1) On behalf of or for the benefit of a specially designated narcotics trafficker; or
(2) With respect to property interests of a specially designated narcotics trafficker.
(b) 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. See Sec. 598.507 on licensing policy with regard to the provision of certain legal services.