The examination must be held upon such subjects as in the opinion of the board of examiners, with the approval of the Commission, the general nature of the business of the office and the special nature of the positions to be filled may require.  In grading the competitors due weight must be given to the efficiency with which the several competitors shall have performed their duties in the office; but none who shall fail to attain a minimum standard of 75 per cent in the written examination shall be certified for promotion.

  REGULATION 3.

  The whole list of eligibles from which the promotion is to be made shall
  be certified to the nominating officer.

  REGULATION 4.

Any person employed in any of the offices to which these regulations apply may be transferred without examination, after service of six months consecutively since January 16, 1883, from one office to a class no higher in another office, upon certification by the board of examiners that he has passed an examination for the class in which he is doing duty, and with the consent of the heads of the respective offices and the approval of the Secretary of the Treasury.

  REGULATION 5.

  The Civil Service Commission may at any time amend these regulations
  or substitute other regulations therefor.

The foregoing regulations are adopted and approved.

GROVER CLEVELAND.

In the exercise of the power vested in the President by the Constitution, and by virtue of the seventeen hundred and fifty-third section of the Revised Statutes and of the civil-service act approved January 16, 1883, the following rule for the regulation and improvement of the executive civil service is hereby amended and promulgated, as follows: 

  RULE IV.

  1.  The Civil Service Commission shall have authority to appoint the
  following-named boards of civil-service examiners: 

The central board.—­This board shall be composed of seven members, who shall be detailed from the Departments in which they may be serving at the time of appointment for continuous service at the office of the Civil Service Commission.  Under the supervision of the Commission, the central board shall examine and mark the papers of all examinations for entrance to the departmental service, and also such of the papers of examinations for entrance to either the customs or the postal service as shall be submitted to it by the Commission.  The Commission shall have authority to require any customs or postal board to send the papers of any examination conducted by said board to be examined and marked by the central board.  The persons composing this board shall be in the departmental service.

  Special boards.—­These boards shall mark the papers of special
  examinations for the classified departmental service, and shall be
  composed of persons in the public service.