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No single guide could provide all the details necessary for the safe acceptance and handling of every item that is classified as hazardous material, restricted matter, or perishable matter. This publication provides general guidelines, along with specific mailability requirements, where possible, for those categories of harmful materials that present significant danger or are frequently presented for mailing.

Particular matter may be mailable under postal statutes and regulations, but customers may have responsibilities under nonpostal statutes and regulations concerned with possession, treatment, transmission, or transfer of such matter (e.g., 49 CFR 100-185 [Department of Transportation Regulations]; the Comprehensive Drug Abuse Prevention and Control Act of 1970 [Public Law 91-513], 21 U.S.C. 801, et seq.; and the Gun Control Act of 1968 [Public Law 90-618], 18 U.S.C. 921, et seq.).

In writing this publication, the following sources were used:

Postal Service

Other Sources

Where appropriate, the names and addresses of agencies where more detailed information can be obtained are provided in this publication.