Read the given paragraph and answer the following questions. 

Panchayati Raj is a system of local self-government established through India's 73rd Constitutional Amendment Act, which added Part IX and Articles 243 to 243O to the Constitution. This system, coined by Jawahar Lal Nehru, came into effect on April 24, 1993, now celebrated annually as National Panchayati Raj Day. One of the primary suggestions of the Balwant Rai Mehta committee was the formation of a three-tier Panchayati Raj structure. The recommended three-tier system includes Gram Panchayat at the village level, Panchayat Samiti at the block level, and Zila Parishad at the district level. Key committees, such as those led by V.T. Krishnammachari, Ashok Mehta, G.V.K. Rao, L.M. Singhvi, and P.K. Thungon, have provided crucial recommendations for shaping the Panchayati Raj system.