Step 1: Understanding the Concept:
The question asks about the subject matter of the 73rd Amendment to the Indian Constitution.
Step 2: Detailed Explanation:
The Constitution (73rd Amendment) Act, 1992 is a landmark amendment that gave constitutional status and protection to Panchayati Raj Institutions (PRIs). It added a new Part IX to the Constitution titled "The Panchayats" and a new Eleventh Schedule containing 29 functional items for the Panchayats. The amendment aimed to strengthen democratic decentralization by making the three-tier system of local self-government in rural areas a constitutional mandate.
Step 3: Final Answer:
The 73rd Constitutional Amendment is related to Panchayati Raj.