NEW DELHI: Top Congress leaders, backed by several Opposition parties, on Tuesday formally started the process of trying to bring an impeachment motion in the Rajya Sabha against Chief Justice of India Deepak Misra, on various charges including arbitrary use of authority to selectively assign important cases to select judges and some other allegations.With only a minimum of 50 MPs’ signatures required to bring such an impeachment motion –– which is easily manageable in the Opposition dominated Upper House –– Congress leaders, including Ghulam Nabi Azad and Anand Sharma have started approaching various leaders belonging to Trinamool Congress, NCP, Left, SP, DMK, IUML to sign up, which many of them have already done. As per the plan, the formal notice to move the motion could be filed within days, perhaps on Wednesday itself, sources said.The Congress-led move, as ET reported in Tuesday’s edition, followed after they concluded that the CJI has failed to positively respond and take concrete remedial actions after four senior judges of the apex court held an unprecedented joint press conference in January to level serious charges against the CJI’s functioning.The charges the Opposition parties have forwarded against the CJI include, according to sources broadly include 1) The CJI’s failure to act on issues raised by four senior judges; 2) the alleged arbitrary use of authority to assign sensitive cases to handpicked judges, ignoring the seniormost judges; 3) the alleged misconduct in hearing a case related to licence to a private medical college; 4) alleged misconduct in acquisition of land when CJI was a practising lawyer and 5) alleged damage to the credibility of the institutional autonomy of the Supreme Court . There is also a whisper in political inner circles of the existence of an audio tape, containing explosive conversation between a legal luminary and an important political leader.“The process initiated by various Opposition parties to bring an impeachment motion against the CJI is a serious matter. This comes in the wake of grave charges levelled by four senior judges of the Supreme Court against the functioning of CJI as well as the charges levelled by retiring judge Amitava Roy,” said NCP MP Majeed Memon.Trinamool leader Mamata Banerjee , who was in Parliament House, told reporters that some Opposition leaders have approached her with the impeachment motion proposal. “My party will go with the rest of the Opposition parties,” she said. Lawyer Prasanth Bhushan also met Banerjee.If admitted, this will be the first instance of a Chief Justice of India facing impeachment motion. Some earlier motions involved a then judge of the Supreme Court, and some High Court judges –– with some surviving the impeachment motion and others quitting to avoid risking the impeachment. With the Opposition aggression, there are speculations whether the government will meet the Opposition move squarely or Parliament will see an abrupt adjournment sine die.