NEW DELHI: Congress-led opposition on Friday prevented Rajya Sabha from functioning by demanding the resignation of road transport minister Nitin Gadkari in light of CAG's censure of Purti group for failing to repay the loan it took from a government agency, deepening uncertainty about the fate of legislations meant to promulgate a uniform countrywide tax on goods and services and confiscate black money and illicit assets stashed abroad.RS was adjourned as many as six times as opposition MPs, with those from Congress in the lead, pressed for discussion on CAG report. Congress members shouted slogans and trooped into the well to demand Gadkari's resignation leading to clashes with BJP members.While Congress members pressed for Gadkari's resignation shouting "Bhrashta Mantri Istifa Do", "Gadkari Ishtifa do", the BJP MPs retorted by sloganeering "Chor Machaye Shor (thief makes noise)". Government sources also rejected the demand of Gadkari's resignation saying that if at all, the CAG report in question was an indictment of functioning the Indian Renewable Energy Development Agency under UPA. They also emphasized that Gadkari had disengaged himself from Purti group was a mere opposition MLC in Maharashtra at the time IREDA extended loan to Purti and, thus, could not have influenced any decision of a central agency.Congress's aggression coincided with the extension of Lok Sabha's session by three days as well as indications that it could , with the help of non-Congress parties in the opposition, take a realistic shot at the passage of the GST bill. Congress sources conceded that the prospects of the passage of the GST bill has improved because of government's success in weaning away regional players like SP, BJD, Trinamool Congress and JDU, but insisted that the voting on the legislation will have to wait till Gadkari quits. "Gadkari or GST, government has to decide," said a senior Congress source.BJP charged that the sudden protest was meant to derail the passage of GST and black money bills. "It is Congress at its meanest," lamented a senior minister.Off-the-record, Congress did not deny that disruptions would help their plan to stop government from passing GST and black money bills, but justified protests by alleging that that BJP also played dirty during UPA's decade.The government is looks at GST bill as a reform measure which could boost investor sentiments by creating a common market bigger in size than the European Union. The Undisclosed Foreign Assets or "black money" bill has been crafted to recover illicit money kept abroad, and can help government counter the charge that it had not done enough to fulfill its election promise to bring back the illegal horde.Leader of opposition Ghulam Nabi Azad accused BJP of double standards, saying the saffron outfit disrupted Parliament on the basis of leaked CAG reports, but now their yardstick about corruption and transparency has changed."Here is a case involving something for which he (Gadkari) had to resign as BJP President in past. This is a CAG report against a company he was heading. Having been indicted he cannot continue as a minister," said Azad.His colleague Anand Sharma slammed ruling BJP, saying in 2012 they stalled Parliament for 23 days after leak of a CAG report, apparently referring to 2G spectrum allocation issue in which then telecom minister A Raja was the target."The CAG reports were like Ramayan and Geeta for the ruling party when they were in opposition… PM must come and reply…the minister should resign," he said.Minister of state for parliamentary affairs Mukhtar Abbas Naqvi retorted by saying, "Congress always talks about corruption. It seems it loves corruption. The government is ready for discussion on corruption. We are ready for discussion on all issues."