" Rule 3 of the Railway Services (Safeguarding of National Security) Rules, 1949, was under consideration in Balakotaiah vs The Union of India(2) and it read: "A member of the Railway Service who, in the opinion of the competent authority is engaged in or is reasonably suspected to be engaged in subversive activities, or is associated with others in subversive activities in such manner as to raise doubts about his reliability, may be compulsorily retired from service, or have his service terminated by the competent authority after he has been given due notice or pay in lieu of such notice in accordance with the terms of his service agreement: Provided that a member of the Railway Service shall not be retired or have his service so terminated unless the competent authority is satisfied that his retention in public service is prejudicial to national security, and unless, (1) ; (2) ; 745 where the competent authority is the Head of a Department, the prior approval of the Governor General has been obtained." In Union of India vs Jeewan Ram(1) this Court had to consider sub rr.