39 C.F.R. § 221.1 The United States Postal Service.
Title 39 - Postal Service
The United States Postal Service was established as an independent establishment within the executive branch of the government of the United States under the Postal Reorganization Act of August 12, 1970 (Pub. L. 91–375, 84 Stat. 719).
Title 39: Postal Service
PART 221—GENERAL ORGANIZATION
§ 221.1 The United States Postal Service.