Departmental supplementary boards.—­These boards shall mark the papers of such supplementary examinations for the departmental service as the Commission may direct, and shall be composed of persons in the public service.

  Departmental promotion boards.—­One for each of the Executive
  Departments, of three members, and one auxiliary member for each bureau
  of the Department for which the board is to act.

Departmental local boards.—­These boards shall be organized at one or more places in each State and Territory where examinations for the departmental service are to be held, and shall each be composed of persons in the public service residing in the State or Territory in which the board is to act.

Customs boards.—­One for each classified customs district, to be composed of persons in the customs service in the district for which said board is to act.  These boards shall conduct examinations for entrance to and promotions in the classified customs service, and shall mark such of the examination papers for that service as the Commission shall direct.  They shall also conduct such departmental examinations as the Commission may direct.

Postal boards.—­One for each classified post-office, to be composed of persons in the postal service at the post-office in which said board is to act.  These boards shall conduct examinations for entrance to and promotions in the postal service, and shall mark such of the examination papers for that service as the Commission may direct.  They shall also conduct such departmental examinations as the Commission may direct.

  2.  No person shall be appointed an examiner until after consultation by
  the Commission with the head of the Department or office in which the
  person whom it desires to appoint is serving.

3.  It shall be the duty of the head of any classified customs office or post-office to promptly give written information to the Commission of the removal or resignation from the public service, or of the inability or refusal to act, of any examiner in his office; and on request of the Commission such officer shall state which of the persons in his office he regards as most competent to fill the vacancy, and shall mention generally the qualifications of each person named by him.

  4.  The duties of an examiner shall be regarded as a part of his public
  duties, and each examiner shall be allowed time during office hours to
  perform the duties required of him.

  5.  The Commission may adopt regulations which shall prescribe (1) the
  manner of organizing the boards of examiners, (2) the powers of each
  board, and (3) the duties of the members thereof.

6.  The Commission may create additional boards of examiners and may change the membership of any board; and boards of examiners shall perform such other appropriate duties as the Commission may impose upon them.

  RULE VI.