The Supreme Court on Thursday refused to interfere with operation of the ordinance providing that states could hold their own entrance examination for admission to undergraduate medical courses bypassing the National Eligibility Entrance Entrance Test (NEET).Refusing to stay the operation of the ordinance as 50 per cent of the states have already conducted their own entrance examination for admission to government colleges, a bench of Justice Anil R.Dave, Justice Shiva Kirti Singh and Justice Adarsh Kumar Goel, however said: "Prima facie we find that the validity of the ordinance is op en to doubt."NGO Sankalp had moved the top court seeking the stay of the ordinance contending that it was it was a patent exercise of judicial power in the garb of ordinance to put the the court decision on hold for one year.