An international organization in which the United States participates, such as the International Bank for Reconstruction and Development, is not a "foreign State" under the Emoluments Clause, U.S. Const. art. I, § 9, cl. 8.
The OLC does not provide release dates for its opinions, so the release date listed is the date on which the opinion was authored. The original opinion is available at www.justice.gov/file/19231/download.