22 CFR 401.22: Attendance of witnesses and production of documents.

(a) Requests for the attendance and examination of witnesses and for the production and inspection of books, papers and documents may be issued over the signature of the secretary of the section of the Commission of the country in which the witnesses reside or the books, papers or documents may be, when so authorized by the Chairman of that section.

(b) All applications for subpoena or other process to compel the attendance of witnesses or the production of books, papers and documents before the Commission shall be made to the proper courts of either country, as the case may be, upon the order of the Commission.