law: 35. Sanction for enquiry, inquiry investigation and prosecution.-
  (1) No investigation agency, including but not limited to Police, Central Bureau of Investigation, Serious Fraud Investigation Office, Directorate of Enforcement and such other agencies, shall conduct any enquiry or inquiry or investigation into any offence alleged to have been committed under any law, in relation to any recommendation made or decision taken by the Chairperson or other directors, employees or officers of the Institution in discharge of his official functions or duties, without the previous approval of-
  (a) the Central Government, where the offence is alleged have to been committed by the Chairperson or other directors; or
  (b) the Managing Director, where the offence is alleged to have been committed by an employee or officer of the Institution:
  Provided that no such approval shall be necessary for cases involving arrest of a person on the spot on the charge of accepting or attempting to accept any undue advantage for himself or for any other person:
  Provided further that the Central Government or the Managing Director, as the case may be, shall convey its decision within a period of three months, and such period may, for reasons to be recorded in writing by the Central Government or the Managing Director, as the case may be, be extended by a further period of one month:
  Provided also that failure of the Central Government or the Managing Director to convey its decision under this sub-section within the time specified under the second proviso shall not be considered as deemed approval for initiation of any enquiry or inquiry or investigation.
  Explanation.-For the purposes of this sub-section, the expression "undue advantage" shall have the meaning as assigned to it under the Prevention of Corruption Act, 1988 (49 of 1988).
  (2) No court shall take cognizance of an offence punishable under any law alleged to have been committed by the Chairperson or other directors, employees or officers of the Institution for which a sanction to conduct any enquiry or inquiry or investigation was granted under sub-section (1), except with the previous sanction of-
  (a) the Central Government, where the offence is alleged to be committed by the Chairperson or other directors; or
  (b) of the Managing Director, where the offence is alleged to be committed by an employee or officer of the Institution:
  Provided that the Central Government or the Managing Director shall, after the receipt of the proposal requiring sanction for prosecution under this sub-section, endeavour to convey the decision on such proposal within a period of three months from the date of its receipt:
  Provided further that in case where, for the purpose of grant of sanction for prosecution, legal consultation is required, such period may, for the reasons to be recorded in writing, be extended by a further period of one month:
  Provided also that failure of the Central Government or the Managing Director to convey its decision under this sub-section within the time specified shall not be considered as deemed approval for the initiation of prosecution.