The CBI today filed its reply on Janata Party President Subramanian Swamy's plea seeking his appointment as public prosecutor in the 2G spectrum allocation scam. The agency told Special CBI Judge O P Saini that Swamy's prayer to appoint him as a public prosecutor is not tenable in law and his private complaint may be dealt separately. The investigating agency emphasised that the Centre, as directed by the Supreme Court, has already appointed senior advocate U U Lalit as the special public prosecutor in the 2G spectrum case. The matter has been put up for further proceedings on the 18th of this month as Swamy sought more time. Swamy had also sought court directions to agencies like the CBI and Enforcement Directorate to assist him in conducting prosecution and in the further investigation into the scam.