1. The classified postal service shall include the officers, clerks,
and other persons in the several post-offices classified under the
provisions of section 6 of the act to regulate and improve the civil
service of the United States, approved January 16, 1883.
2. Whenever the officers, clerks, and other persons in any post-office
number as many as fifty, any existing classification of the postal
service made by the Postmaster-General under section 6 of the act of
January 16, 1883, shall apply thereto, and thereafter the Commission
shall provide examinations to test the fitness of persons to fill
vacancies in said post-office and these rules shall be in force therein.
Every revision of the classification of any post-office under section 6
of the act above mentioned, and every inclusion of a post-office within
the classified postal service, shall be reported to the President.