Sometimes the ENEM replaces the old elimination Part I (""primeira fase"") of the Vestibular. Alternatively, ENEM results may be used as part of the final overall grade in the Vestibular. More rarely, a few public universities have decided not to use ENEM grades at all and continue to base their admission criteria on the Vestibular only. Notable examples in the latter group include the highly prestigious federal military schools like ITA and IME and, as of 2010, the prestigious state research universities in the state of São Paulo (USP and UNICAMP). Resistance to the ENEM among some top public universities comes mostly from the perception that the national federal exam is less selective/rigorous than the older independent Vestibular.