Horizontal reservation refers to the equal opportunity provided to other categories of beneficiaries such as women, veterans, the transgender community, and individuals with disabilities, cutting through the vertical categories. It is a form of affirmative action that seeks to promote the inclusion of socially and economically backward groups by guaranteeing them a fixed proportion of positions in employment, education, and representation at the political level. In India, horizontal reservation comes under Article 15(3) of the Constitution of India. The difference between vertical and horizontal reservations is that vertical reservation is the reservation for Scheduled Castes, Scheduled Tribes, and Other Backward Classes, while horizontal reservation is the reservation for the disadvantaged group in society. The horizontal quota is applied separately to each vertical category, and not across the board. Horizontal reservation is a form of positive discrimination created to promote equality among marginalized sections.