(d) Assistant cashier.
(e) Superintendents designated by the Post-Office Department and reported as such to the Commission.
(f) Custodians of money, stamps, stamped envelopes, or postal cards, designated as such by the Post-Office Department and so reported to the Commission, for whose fidelity the postmaster is under official bond.
6. No person appointed to a place under any exception to examination hereby made shall within one year after appointment be transferred to another place not also excepted from examination; but a person who has served not less than one year in an examination-excepted place may be transferred in the post-office in which he is serving to a place not excepted from examination: Provided, That before any such transfer may be made the Commission must certify that the person whom it is proposed to so transfer has passed an examination to test fitness for the place proposed to be filled by such transfer.
POSTAL RULE III.
1. The papers of every examination shall be marked under the direction of the Commission, and each competitor shall be graded on a scale of 100, according to the general average determined by the marks made by the examiners on his papers.
2. The Commission shall appoint in each classified post-office a board of examiners, which shall (a) Conduct all examinations held to test fitness for entrance to or promotion in the classified service of the post-office in which the board is located.
(d) Mark the papers of such examinations, unless otherwise directed, as provided for by General Rule III, clause 12.
(c) Conduct such examinations for the classified departmental service as the Commission may direct.
3. The papers of an examination having been marked, the board of examiners shall ascertain—