{"data":{"id":"us/19-cfr-145.73","jurisdiction":"us","citation":"19 CFR 145.73","heading":"Definitions.","body":"For purposes of this subpart:\nDesignated operator means an entity officially designated by a member country of the UPU to operate postal services and fulfill its treaty obligations to the UPU. USPS is thus considered a designated operator for the United States.\nExpress Mail Service or EMS means the optional supplementary postal express service for documents and merchandise.\nInternational Mail Facility or IMF means an official international mail processing center operated by CBP.\nItem ID means the unique item identifier, in both human-readable and barcode format.\nLetter class mail—documents means letter class (in UPU terms, letter post) mail containing only documents. Documents consist of any piece of written, drawn, printed or digital information, excluding objects of merchandise and may include M-Bags to the extent that such items do not contain goods.\nLetter class mail—goods means letter class (in UPU terms, letter post) mail up to 2 kilograms containing goods, also referred to as “small packets”. Mail over 2 kilograms containing goods must use a postal service other than letter class.\nParcel post means any mail article mailed at the parcel rate or equivalent class or category of postage.\nUniversal Postal Union or UPU means the specialized agency of the United Nations that sets the rules for international postal service for member countries.","path":["Title 19—Customs Duties","CHAPTER I—U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY","PART 145—MAIL IMPORTATIONS","Subpart G—Mandatory Advance Electronic Data for Mail Shipments"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-19.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:40Z","sha256":"91fafdeffce12151aa5953d294ddf94e69f53b1c1ddf3a00e22840ddfe4cefe3","source_id":"us-cfr","stale":true,"prev":"us/19-cfr-145.72","next":"us/19-cfr-145.74"},"notice":"GroundRules: Original legal text. Not legal advice."}