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Publication 52 - Hazardous, Restricted, and Perishable Mail >
6 International Mail
This chapter contains regulations on the mailability of hazardous materials, restricted matter, and perishable matter that may be sent as international mail. Additional information on these subjects is contained in Chapters 3, 4, and 5, and in Mailing Standards of the United States Postal Service, International Mail Manual (IMM) 135–138.