The Constitution provides for the establishment of Public Service Commission                      
I.        For the union                    
II.        For each state                   
III.        Common for union states                  
IV.        Common for two or more states

Article 315 of the Constitution Public Service Commissions for the Union and for the States— (1) Subject to the provisions of this article, there shall be a Public Service Commission for the Union and a Public Service Commission for each State. (2) Two or more States may agree that there shall be one Public Service Commission for that group of States, and if a resolution to that effect is passed by the House or, where there are two Houses, by each House of the Legislature of each of those States, Parliament may by law provide for the appointment of a Joint State Public Service Commission (referred to in this Chapter as Joint Commission) to serve the needs of those States.