---
kind: "section"
citation: "39 C.F.R. § 3055.45"
title: "39"
number: "3055.45"
heading: "First-Class Mail."
url: "https://uscodex.org/cfr/39/3055.45"
---

# §3055.45. First-Class Mail.

- (a) **Single-Piece Letters/Postcards, Presorted Letters/Postcards, and Flats.** For each of the Single-Piece Letters/Postcards, Presorted Letters/Postcards, and Flats products within the First-Class Mail class, report the:
  - (1) 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, provided at the District, Postal Administrative Area, and National levels; and
  - (2) Service variance (as a percentage rounded to one decimal place) for mail delivered within +1 day, +2 days, and +3 days of its applicable service standard, 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, provided at the District, Postal Administrative Area, and National levels.
- (b) **Outbound Single-Piece First-Class Mail International and Inbound Letter Post.** For each of the Outbound Single-Piece First-Class Mail International and Inbound Letter Post products within the First-Class Mail class, report the:
  - (1) 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, provided at the Postal Administrative Area and National levels; and
  - (2) Service variance (as a percentage rounded to one decimal place) for mail delivered within +1 day, +2 days, and +3 days of its applicable service standard, 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 and in the aggregate for all service standards combined, provided at the Postal Administrative Area and National levels.

## Notes

### Amendments

[88 FR 10041, 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 10041, Feb. 16, 2023]