(a) Any position filled by a person whose place of private business is conveniently located for the performance of the duties of said position, or any position filled by a person remunerated in one sum both for services rendered therein and for necessary rent, fuel, and lights furnished for the performance of the duties thereof:  Provided, That in either case the performance of the duties of said position requires only a portion of the time and attention of the occupant, paying him a compensation not exceeding, for his personal salary only, $300 per annum, and permitting of his pursuing other regular business or occupation.

  (b) Any person in the military or naval service of the United
  States who is detailed for the performance of civil duties.

  (c) Any person employed in a foreign country under the State
  Department or temporarily employed in a confidential capacity in a
  foreign country.

  (d) Any position whose duties are of a quasi military or quasi
  naval character and for the performance of whose duties a person is
  enlisted for a term of years.

  RULE IV.

1.  In pursuance of the provisions of section 2 of the civil-service act, there shall be provided, to test fitness for admission to positions which have been or may hereafter be classified under the civil-service act, examinations of a practical and suitable character involving such subjects and tests as the Commission may direct.

2.  No person shall be appointed to or be employed in any position which has been or may hereafter be classified under the civil-service act until he shall have passed the examination provided therefor or unless he is especially exempt from examination by the provisions of said act or the rules made in pursuance thereof.

  3.  In pursuance of the provisions of section 2 of the civil-service act,
  wherever competent persons can be found who are willing to compete, no
  noncompetitive examination shall be given except as follows: 

  (a) To test fitness for transfer or for promotion in a part of
  the service to which promotion regulations have not been applied.

  (b) To test fitness for appointment of Indians as
  superintendents, teachers, teachers of industries, kindergartners, and
  physicians in the Indian service at large.

The noncompetitive examinations of Indians for the positions mentioned shall consist of such tests of fitness, not disapproved by the Commission, as may be determined upon by the Secretary of the Interior.  A statement of the result of every noncompetitive test and all appointments, transfers, or promotions based thereon shall be immediately forwarded to the Commission.

4.  In pursuance of the provisions of section 3 of the civil-service act, examinations