A vacancy in any position which has been or may hereafter be classified under the civil service act may, upon requisition of the proper officer and the certificate of the Commission, be filled by the reinstatement without examination of any person who within one year next preceding the date of said requisition has through no delinquency or misconduct been separated from a classified position at the date of said requisition and in that Department or office and that branch of the service in which said vacancy exists:  Provided, That for original entrance to the position proposed to be filled by reinstatement there is not required by these rules, in the opinion of the Commission, an examination involving essential tests different from or higher than those involved in the examination for original entrance to the position formerly held by the person proposed to be reinstated:  And provided further, That, subject to the other conditions of these rules, any person who served in the military or naval service of the United States in the late War of the Rebellion and was honorably discharged therefrom, or the widow of any such person, may be reinstated without regard to the length of time he or she has been separated from the service.

  RULE X.

  Within that part of the civil service of the United States which has
  been or may hereafter be classified under the civil-service act
  transfers shall be governed as follows: 

1.  A person in any Department or office may be transferred within the same Department or office and the same branch of the service upon any test of fitness, not disapproved by the Commission, which may be determined upon by the appointing officer, subject to the limitations of the provisos of section 2 of this rule.

2.  A person who has received absolute appointment may be transferred without examination from any Department, office, or branch of the service upon requisition and consent of the proper officers and the certificate of the Commission:  Provided, That no transfer shall be made of a person to a position within the same Department or office and the same branch of the service, or to a position in another Department, office, or branch of the service, if from original entrance to such position said person is barred by the age limitations prescribed therefor or by the provisions regulating apportionment, or if in said position there is not required, in the judgment of the Commission, the performance of the same class of work or the practice of the same mechanical trade performed or practiced in the position from which transfer is proposed:  And provided further, That transfer shall not be made without examination, provided by the Commission, to a position for original entrance to which, in the judgment of the Commission, there is required by these rules an examination involving essential tests different from or higher than those involved in the examination