Publication 52 - Hazardous, Restricted, and Perishable Mail

September 7, 2023

Summary of Changes Transmittal Letter 1 Introduction 11 Purpose 12 Scope 13 Additional Information 14 Safety 15 Protecting Personnel 16 Military Postal System 17 Statutory System 18 Trademarks of the USPS 2 General Guidelines 21 Mailability 22 Marking Requirements 23 Handling Hazardous Materials 24 Emergency Procedures 25 Basic Guidelines for Postal Service Personnel 3 Hazardous Materials 31 Definition 32 General 33 Hazard Classes 34 Mailability by Hazard Class 4 Restricted Matter 41 General 42 Intoxicating Liquors 43 Firearms 44 Knives and Sharp Instruments 45 Other Restricted Materials 46 Animal-Fighting Ventures 47 Cigarettes, Smokeless Tobacco, and Electronic Nicotine Delivery Systems 5 Perishable Matter 51 Definition 52 Animals 53 Fresh Foods and Other Perishables 54 Eggs 55 Meats and Meat Products 56 Plants 57 Nonmailable Plant Pests, Injurious Animals, and Illegally Taken Fish or Wildlife 6 International Mail 61 General 62 Hazardous Materials: International Mail 63 Restricted Matter: International Mail 64 Perishable Matter: International Mail 7 Air Transportation Requirements 71 General 72 Hazardous Materials: Air Transportation 73 Restricted Matter: Air Transportation 74 Perishable Matter: Air Transportation

Appendix A Appendix B Appendix C USPS Packaging Instruction 1A USPS Packaging Instruction 1B USPS Packaging Instruction 2A USPS Packaging Instruction 2B USPS Packaging Instruction 2C USPS Packaging Instruction 2D USPS Packaging Instruction 2E USPS Packaging Instruction 2F USPS Packaging Instruction 3A USPS Packaging Instruction 3B USPS Packaging Instruction 3C USPS Packaging Instruction 3D USPS Packaging Instruction 4A USPS Packaging Instruction 4B USPS Packaging Instruction 5A USPS Packaging Instruction 6A USPS Packaging Instruction 6B USPS Packaging Instruction 6C USPS Packaging Instruction 6D USPS Packaging Instruction 6E USPS Packaging Instruction 6F USPS Packaging Instruction 6G USPS Packaging Instruction 6H USPS Packaging Instruction 7A USPS Packaging Instruction 8A USPS Packaging Instruction 8B USPS Packaging Instruction 8C USPS Packaging Instruction 9A USPS Packaging Instruction 9B USPS Packaging Instruction 9C USPS Packaging Instruction 9D USPS Packaging Instruction 9E USPS Packaging Instruction 10A USPS Packaging Instruction 10B USPS Packaging Instructions 10C USPS Packaging Instruction 10D Appendix D Appendix E Postal Service Publications and Reference Materials Other Publications Appendix F Appendix G STCs Domestic Outbound (Required) STCs Domestic Outbound (Optional) STCs Domestic Returns (Required) STCs Domestic Returns (Optional) ESCs Domestic (Optional) ESCs Domestic and International, including APO/FPO/DPO (Required) ESCs International and APO/FPO/DPO (Required) Index