39 CFR Part 121
PART 121—SERVICE STANDARDS FOR MARKET-DOMINANT MAIL PRODUCTS
- PART 121—SERVICE STANDARDS FOR MARKET-DOMINANT MAIL PRODUCTS
- Chapter I—United States Postal Service › Subchapter C—Post Office Services [Domestic Mail]
- § 121.0 Market-dominant product service standards.
- § 121.1 First-Class Mail.
- § 121.2 Periodicals.
- § 121.3 USPS Marketing Mail.
- § 121.4 Package Services.
- Appendix A to Part 121—Tables Depicting Service Standard Day Ranges
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