39 CFR 20.3 - Availability of the International Mail Manual.
Copies of the International Mail Manual may be purchased from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402-9371. The IMM is available for examination on the Internet at http://pe.usps.gov. Copies are available for public inspection during regular business hours at area and district offices of the Postal Service and at all post offices, classified stations, and classified branches. You may also inspect a copy at the U.S. Postal Service Library, 475 L'Enfant Plaza West SW., Washington, DC 20260-1641, or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.