The 73rd and 74th amendments of the Indian Constitution are crucial for the UPSC as they provide a constitutional framework for local governance through Panchayati Raj and Municipalities. These amendments empower local bodies, ensuring decentralization of power and increased public participation in governance. Understanding these reforms is essential for questions related to administrative structure, as they highlight the importance of grassroots democracy in India. Furthermore, knowledge of these amendments is vital for candidates aspiring to join administrative services and contribute to effective governance at all levels.