The Articles 15 and 16 allow the State to give reservations only to Scheduled Castes, Scheduled Tribes and socially or educationally backward classes. A 9-judge bench in 1992, too, while upholding the reservation for OBCs, had held that the reservation be limited to 50% and that Article 15 only allowed for reservation for socially or educationally backward, and not economically backward classes. It had noted that reservation only on economic basis, and without any scientific data on historical discrimination, does not hold in the light of the constitution. The bench had struck down PV Narsimha Rao government's decision to give 10% quota to economically backward classes among the general category. However, union minister Arun Jaitley on Tuesday said that Rao’s decision could not stand the legal test because it did not have the constitutional backing. He also said that the 50% cap applied only to caste-based reservations.