my dad doing job in indian railway.my question is tht newdelhi wil ask for a noc from railway that they dnt have obejection to give long vaction(ex. 6 months) to my dad.because my dad dont want to get retirment and want to come back for contiune. Plz help other members whos perents in goverment jobs plz tel me wht document nd wil ask for procesing the case.