The Supreme Court referred a 1998 judgment that provided immunity to MPs and MLAs in cash-for-votes cases to a seven-judge bench recently.
It granted legislators immunity against criminal prosecution for bribery charges related to their parliamentary activities.
The P V Narasimha Rao case originated from the 1993 JMM bribery case, where legislators were accused of taking bribes to influence parliamentary votes.
The Supreme Court had granted immunity under Article 105(2) in that case.
In 2012, Sita Soren, was accused of accepting a bribe to vote for an independent candidate in a Rajya Sabha election.
She attempted to invoke Article 194(2) for immunity, but the High Court declined her request, leading to further legal proceedings.