Hazardous, restricted, or perishable materials mailed to, from, and between overseas military or diplomatic Post Offices are subject to the conditions of IMM 130, the standards in this publication, conditions prescribed by the Department of State international security policy, and conditions prescribed by the Department of Defense (DOD), as listed in Overseas Military/Diplomatic Mail in the Postal Bulletin. Also see Chapter 6 and DMM 703.2 for information on air transportation and other restrictions affecting APO/FPO/DPO, SAM, and PAL service.
Hazardous materials that are prohibited from mailing via air transportation cannot be mailed to any ZIP Code that is serviced only by air transportation (e.g., certain ZIP Codes in Alaska).
The following types of hazardous materials are prohibited from transport via aircraft under any circumstances:
- Anything susceptible to damage or that can become harmful because of changes in temperature or atmospheric pressures, unless protected against the effects of such changes.
- Magnetic material that has a field strength sufficient to cause a compass deviation at a distance of 7 feet or more from any point on the outer packaging.
- Flammable materials (gases, liquids, and solids).
- Radioactive materials.
- Hazardous materials excluded from air shipment by the regulations of 49 CFR 100-185, or by the applicable country or air carrier operator variations.