USPTO Reminder: Outsourcing of Patent Preparation May Require Clearance.
Per a Federal Register notice published on July 23, 2008:
Applicants and registered patent practitioners are reminded that the export of subject matter abroad pursuant to a license from the United States Patent and Trademark Office (USPTO), such as a foreign filing license, is limited to purposes related to the filing of foreign patent applications. Applicants who are considering exporting subject matter abroad for the preparation of patent applications to be filed in the United States should contact the Bureau of Industry and Security (BIS) at the Department of Commerce for the appropriate clearances.
The entire Federal Register notice may be viewed here.