Mail Screening Regulations
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Issuing agencies
Abstract
The Postal Service is amending its regulations regarding the screening of mail to be consistent with aviation regulations regarding the transportation of mail via aircraft; continue to enhance the security and ensure the safety of all persons and property onboard aircraft carrying mail; and prevent and deter the carriage of unauthorized explosives, incendiaries, or other destructive substances or items in the mail or in postal products transported onboard aircraft.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.