( 1 ) THESE are four criminal revision petitions bearing No. 49/92, 50/92, 51/92 and 52/92 preferred by Central Bureau of Investigation against the order dated September 4, 1991 passed by Shri V. S. Aggarwal, Special Judge, Delhi, whereby he declined to grant permission to the Central Bureau of Investigation for the closure of the case against the respondents (hereinafter referred to as to petitioner for convenience ). All the four petitions are being taken up together as the common questions of law and facts are like to arise while disposing them of. Brief facts which led to the filing of the present petitions are as under: that the petitioner registered a case against the respondents herein under Section 120-B of the Indian Penal Code and Section 5 (2) read with Section 5 (1) (d) of the Prevention of Corruption Act, 1947 (hereinafter referred to as the Act for sake of brevity ). However, during the course of ivestigation the petitioner could not collect sufficient evidence under the Sections alluded to above to file a charge-sheet agaisnt the respondents. Consequently, in the circumstances stated above, the petitioner applied to the Special Judge for closure