NEW DELHI, Nov. 25 -- The Centre plans to bring the four labour codes into force by the next financial year as a few states are still finalizing the regulatory framework required for implementation, two people familiar with the matter said.

West Bengal has held out against the mandatory pre-publication of draft rules, while Tamil Nadu, Delhi and Lakshadweep remain in various stages of compliance, the people said, requesting anonymity because the matter is still under deliberation. West Bengal is ruled by the Trinamool Congress (TMC), Tamil Nadu by the Dravida Munnetra Kazhagam and Delhi by the Bharatiya Janata Party.

Labour is a concurrent subject, meaning both the central government and the state governments can legislate on it. Althou...