GroundRules
39 CFR 121.0: Market-dominant product service standards.
Where this section sits in the code
- Title 39—Postal Service
- CHAPTER I—UNITED STATES POSTAL SERVICE
- SUBCHAPTER C—POST OFFICE SERVICES [DOMESTIC MAIL]
- PART 121—SERVICE STANDARDS FOR MARKET-DOMINANT MAIL PRODUCTS
Service standards in this part are contingent upon proper acceptance before the applicable day-zero Critical Entry Time (CET). Applying the service standards appearing in this part, effective service standards for combinations of 5-digit originating ZIP Codes and 5-digit destinating ZIP Codes can be found in a lookup table at www.usps.com.
Collected 2026-08-27T02:25:51Z. Source file · JSON