"We reserve the right to take recourse to all available alternatives including a court challenge," party spokesman Abhishek Singhvi told reporters asserting that "by no stretch of imagination, the Aadhar bill is money bill".
He steered clear of questions whether Congress would bring a motion of breach of privilege against Finance Minister Arun Jaitley, who is Leader of the Rajya Sabha, for "misleading" the House on the issue.
Insisting that the practice of getting a "certificate" from the Lok Sabha Speaker cannot become "methodology" of bypassing the Upper House, he said it was an insult of the Rajya Sabha.
Replying to questions, he said the Speaker's ruling may operate inside Parliament, but it is "not higher than the Constitution" and "not binding on court".
In the Rajya Sabha, party leader Jairam Ramesh attacked the Finance Minister saying he had in his attempt to justify the move "misled" the House by claiming that the past two bills, one on Juvenile Justice and another on African Development Bank, had been brought as money bills.