CBI said the file recommending an appeal against the High Court's order was pending before the Ministry of Law and the agency was pursuing it expeditiously and was waiting for the report to proceed accordingly.
Special CBI Judge Bharat Parashar, however, told CBI that it should pursue the matter with the Ministry so that it could be decided soon.
"He, however, states that the matter is being pursued over there to have an expeditious report," the court said.
The High Court on September 5, 2014 had quashed charges of cheating, forgery and criminal conspiracy framed by the trial court against PIL and its director (Corporate Affairs) A K Chaturvedi.
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The other two accused -- Goutam Kumar Basak and Soumen Chatterjee -- have sought alteration of charges framed against them earlier in view of the High Court's order.
During the hearing today, the court heard part arguments on the plea filed by the two public servants and posted the matter for further proceeding on February 11.
Basal and Chatterjee were earlier put on trial on the charges of cheating, forgery and other offences under IPC and under provisions of the Prevention of Corruption Act for allegedly giving a misleading report regarding the production capacity of PIL.