Which amendment provided a three-tier system of Panchayati Raj for all states having a population of over twenty lakh?

The 73rd Amendment

It was in 1992 that grassroots democracy or decentralised governance was ushered in by the 73rd Constitutional Amendment. This act provided constitutional status to the Panchayati Raj Institutions (PRIs). It is compulsory now for local self-government bodies in rural and municipal areas to be elected every five years.

The 73rd Amendment provided a three-tier system of Panchayati Raj for all states having a population of over twenty lakhs.