does not evaporate with the passing of time but it clings to a person wherever
he may roam. It cannot be taken away from a citizen unless he voluntarily
renounces it or loses it in due course of law. The onus of proving that the
citizen has lost his citizenship is on the Government who seeks to deprive him
of his right as a citizen.
Narayan Roy Vs. Secretary, Ministry of Home Affairs, 14 BLD (HCD) 215.