Section 20(4) in The Indian Postal Service (Group 'A') Rules, 1987
(4)Selection Grade of the Junior Administrative Grade. - Appointments to the Selection Grade of the Junior Administrative Grade of the service shall be made by promotion from amongst officers in the Junior Administrative Grade of the service who have entered the 14the year of the service on the 1st July of the year calculated from the year following the year of selection on the basis of which the officers was recruited. Selection shall be made on merit by a duly constituted Departmental Promotion Committee in the order of seniority taking into the account the overall performance, experience and other Central Government from time to time.
