(b) From any classified post-office or from the classified railway mail service to the Post-Office Department, and from the Post-Office Department to any classified post-office, or to the classified railway mail service, upon requisition of the Post-master-General.
2. No person may be transferred as herein authorized until the Commission shall have certified to the officer making the transfer requisition that the person whom it is proposed to transfer has passed an examination to test fitness for the place to which he is to be transferred, and that such person has been at least six months next preceding the date of the certificate in the classified railway mail service or in the classified service of the Department or post-office from which the transfer is to be made.
Approved, January 4, 1889.
GROVER CLEVELAND.
RAILWAY MAIL RULES.
RAILWAY MAIL RULE I.
The classified railway mail service shall include all the officers, clerks, and other persons in that service 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.
RAILWAY MAIL RULE II.
1. To test fitness for admission to the classified railway mail service the following examinations shall be provided:
Clerk examination,—This examination shall include not more than the following subjects: