Senior advocates Kapil Sibal and A M Singhvi, appearing for the father-son duo, sought extension of protection granted to Chidambarams.
CBI also informed the court that requisite sanctions to prosecute certain public servants, accused in the case, has been obtained.
It had earlier said that similar nod was procured for P Chidambaram.
Chidambaram and his son Karti were named in the charge sheet filed by the Central Bureau of Investigation in the case on July 19. The agency filed a supplementary charge sheet before the special judge, who had fixed it for consideration on July 31.
The CBI is probing how Chidambaram, who was the Union Finance Minister in 2006, granted a Foreign Investment Promotion Board (FIPB) approval to a foreign firm, when only the Cabinet Committee on Economic Affairs (CCEA) was empowered to do it.
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