---
kind: "section"
citation: "39 C.F.R. § 3055.20"
title: "39"
number: "3055.20"
heading: "First-Class Mail."
url: "https://uscodex.org/cfr/39/3055.20"
---

# §3055.20. First-Class Mail.

- (a) For each of the Single-Piece Letters/Postcards, Presorted Letters/Postcards, and Flats products within the First-Class Mail class, report the on-time service performance (as a percentage rounded to one decimal place), disaggregated by mail subject to the overnight, 2-day, 3-day, 4-day, and 5-day service standards, as well as in the aggregate for the 3-to-5-day service standards.
- (b) For each of the Outbound Single-Piece First-Class Mail International and Inbound Letter Post products within the First-Class Mail class, report the on-time service performance (as a percentage rounded to one decimal place), disaggregated by mail subject to the 2-day, 3-day, 4-day, and 5-day service standards, as well as in the aggregate for the 3-to-5-day service standards and in the aggregate for all service standards combined.
- (c) For each product that does not meet its service goal during the reporting period, report the point impact data for the top ten root causes of on-time service performance failures, at the Postal Administrative Area and National levels, during the previous fiscal year. “Point impact data” means the number of percentage points by which on-time performance decreased due to a specific root cause of failure. Identification and a description of all potential root causes of failure assigned during the previous fiscal year and any changes to the Postal Service's methodology for calculating point impact data shall be included.

## Notes

### Amendments

[88 FR 10039, Feb. 16, 2023]

### Authority

Authority: 39 U.S.C. 503, 3622, 3651, 3652, 3653, 3691, 3692, 3705.

### Source

Source: 75 FR 38742, July 6, 2010, unless otherwise noted.

### Amendments

[88 FR 10039, Feb. 16, 2023]