Publication 52 - Hazardous, Restricted, and Perishable Mail > 2 General Guidelines
2 General Guidelines
21 Mailability
211 General
212 Mailer Responsibility
213 Authority
214 Appeals
215 Requests for Rulings
215.1 General
215.2 Hazardous Materials
215.3 Restricted Matter or Perishable Matter
216 Nonmailable Matter Found in the Mail
22 Marking Requirements
221 General
221.1 Address Side of Mailpiece
221.2 Ancillary Endorsements
222 Matter Excepted From Markings
223 Hazardous Materials Warning Labels and Markings
224 Tag 44 for Hazardous Materials
225 Other Postal Service Labels and Tags
226 Package Orientation Markings
227 Old Markings
228 Shipping Papers
23 Handling Hazardous Materials
231 General
232 Nonmailable Hazardous Materials Found in the Mailstream
24 Emergency Procedures
241 General Requirements
242 Hazard Duration
243 Precautions
244 Procedures
245 Hazardous Chemical Emergencies
246 Emergency Telephone Numbers
25 Basic Guidelines for Postal Service Personnel
251 Guidelines for Acceptance Personnel
252 Guidelines for Dispatch Personnel
253 Guidelines for Delivery and Collection Personnel