Official mail (sent by federal agencies and departments listed in Postal Service Handbook DM–103, Official Mail) that bears the indicia prescribed in DMM 703 may be sent to foreign destinations. Such items are subject to the postage payment requirements, weight and size limits, customs form requirements, and general conditions for mailing that otherwise apply to the class and category of the international mail being sent.
International mailpieces that are sent by or on behalf of the U.S. Postal Service must bear the prescribed G-10 permit indicia. Postal Service official mail is subject to all restrictions (e.g., maximum size and weight limits) as defined in the Individual Country Listings for the destination country of mailing.