Title 39 › Part IV— MAIL MATTER › Chapter 36— POSTAL RATES, CLASSES, AND SERVICES › Subchapter I— PROVISIONS RELATING TO MARKET-DOMINANT PRODUCTS › § 3621
Applies to ten kinds of mail, including first-class letters and sealed parcels, first-class cards, periodicals, standard mail, single-piece parcel post, media mail, bound printed matter, library mail, special services, and single-piece international mail. Each kind is defined the same way as in the mail classification schedule.
Full Legal Text
Postal Service — Source: USLM XML via OLRC
Legislative History
Reference
Citation
39 U.S.C. § 3621
Title 39 — Postal Service
Last Updated
Apr 5, 2026
Release point: 119-73not60