(c)a person who, for other legitimate reasons, has received prior approval of the Government of India and where the applicant submits an undertaking to the effect that he -(i)has lawful possession of the arm;(ii)has knowledge of the safe handling, safe-storage and use of the arm in question and where applicable, its public display;(iii)has need to possess the arm and cannot reasonably satisfy that need by means other than the possession of an arm; and(iv)has attained the minimum age of twenty-one years.