Post office and the colorable Postal service

https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title39-section201&num=0&edition=prelim

§201. United States Postal Service

There is established, as an independent establishment of the executive branch of the Government of the United States, the United States Postal Service.

( Pub. L. 91–375, Aug. 12, 1970, 84 Stat. 720 .)

Statutory Notes and Related Subsidiaries
Effective Date

Section effective July 1, 1971, pursuant to Resolution No. 71–9 of the Board of Governors. See section 15(a) of Pub. L. 91–375, set out as a note preceding section 101 of this title.
Transfer of Functions; Abolition of Office

Pub. L. 91–375, §4(a), Aug. 12, 1970, 84 Stat. 773 , provided that: "There are hereby transferred to the United States Postal Service all the functions, powers, and duties of the Post Office Department and the Postmaster General of the Post Office Department, and the Post Office Department and the office of Postmaster General of the Post Office Department are abolished."