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Part 121
FEDERAL · 39 CFR
Part 121 — Service Standards for Market-Dominant Mail Products
5 sections · Title 39: Postal Service
§ 121.0
Market-dominant product service standards.
§ 121.1
First-Class Mail.
§ 121.2
Periodicals.
§ 121.3
USPS Marketing Mail.
§ 121.4
Package Services.