(1) No court shall take cognizance of an offence punishable under sections 7, 10, 11, 13 and 15 alleged to have been committed by a public servant, except with the previous sanction,--
(a) in the case of a person who is employed in connection with the affairs of the Union and is not removable from his office save by or with the sanction of the Central Government, of that Government;
(b) in the case of a person who is employed in connection with the affairs of a State and is not removable from his office save by or with the sanction of the State Government, of that Government;
(c) in the case of any other person, of the authority competent to remove him from his office.