Publication 52 - Hazardous, Restricted, and Perishable Mail > 7 Air Transportation Requirements > 72 Hazardous Materials: Air Transportation
Mailpieces containing hazardous material must meet the following conditions:
Hazardous materials are not acceptable for air transportation if they are not prepared in compliance with the specific applicable requirements. These requirements consider the degree of hazard, quantity of material, method of packaging, required Shipper‘s Declaration for Dangerous Goods, and adequacy of labels and/or markings required for carriage aboard an aircraft.
Chapters 3 and 6, and the Packaging Instructions in Appendix C, provide full details of the conditions under which mailable hazardous materials (domestic) and dangerous goods (international) may be mailed via air transportation