New Delhi, June 25 -- The decision regarding rebel Shiv Sena (UBT) and Trinamool Congress Lok Sabha members is expected before the Monsoon Session of Parliament scheduled next month.

Sources say Speaker Om Birla has met and heard all sides and will now take advice from legal and constitutional expertsThe rebel TMC leaders have decided to merge with the little-known Nationalist Citizens Party of India (NCPI) while six Shiv Sena (UBT) MPs formally joined the Shiv Sena led by Eknath Shinde.

Sources say the decision on whether the breakaway factions get the recognition will be based on the opinion of the union law ministry.

The legal opinion will be sought so that the Speaker's decision, if challenged in court, can withstand judicial scrutin...