(a) The Postal Service shall plan, develop, promote, and provide
adequate and efficient postal services at fair and reasonable rates
and fees. The Postal Service shall receive, transmit, and deliver
throughout the United States, its territories and possessions, and,
pursuant to arrangements entered into under sections 406 and 411 of
this title, throughout the world, written and printed matter,
parcels, and like materials and provide such other services
incidental thereto as it finds appropriate to its functions and in
the public interest. The Postal Service shall serve as nearly as
practicable the entire population of the United States.
(b) It shall be the responsibility of the Postal Service -
(1) to maintain an efficient system of collection, sorting, and
delivery of the mail nationwide;
(2) to provide types of mail service to meet the needs of
different categories of mail and mail users; and
(3) to establish and maintain postal facilities of such
character and in such locations, that postal patrons throughout
the Nation will, consistent with reasonable economies of postal
operations, have ready access to essential postal services.
(c) In providing services and in establishing classifications,
rates, and fees under this title, the Postal Service shall not,
except as specifically authorized in this title, make any undue or
unreasonable discrimination among users of the mails, nor shall it
grant any undue or unreasonable preferences to any such user.