The prohibitions in §§ 542.201 and 542.212 on dealing in property subject to those sections and the prohibition in § 542.207 on exporting services to Syria prohibit U.S. financial institutions from performing under any existing credit agreements, including charge cards, debit cards, or other credit facilities issued by a financial institution to a person whose property and interests in property are blocked pursuant to § 542.201 or a person determined to be subject to the prohibitions of § 542.212.
31 C.F.R. §542.409