Mayawati has warned the Central Govt of taking a tough stand if the govt does not pass the Quota Bill which would entitle reservations in promotions in govt jobs for Scheduled castes and tribes ! The same bill is being opposed by SP headed by Mulayam Singh Yadav.The conflict between Mayawati and Mulayam Singh has been refueled with the Quota Bill and its the UPA govt which is at the receiving end.