Concept:The 73rd Amendment Act of 1992 provides constitutional reservation for women in local self‑government bodies.Explanation:Article 243D of the Constitution mandates that at least one‑third of the total seats and chairperson positions in Panchayati Raj Institutions must be reserved for women.This reservation is already in force across all states.Women’s reservation in Lok Sabha and Vidhan Sabha is proposed in the Women’s Reservation Bill (108th Amendment), but it has not yet been passed by the Lok Sabha and is still pending.Hence, the only existing constitutional reservation for women is in Panchayati Raj Institutions.Answer:Panchayati Raj Institutions