Raising the issue through a Zero Hour mention, party leader Satish Chandra Misra said under Article 341 sub clause (2) of the Constitution, the power to make changes in the SC list lies only with Parliament.
The BSP president demanded that the state government immediately withdraw the "undemocratic order" and increase the SC quota to ensure that the category's interests were not harmed.
The announcement comes a day after the BSP supremo held a meeting with party workers to review her outfit's showing in the recent Lok Sabha polls.
In a statement issued here, she said, "The Union Labour Ministry, in its data released after the Lok Sabha election, has confirmed that joblessness in the country was 6.1 per cent of total labour force, highest in the last 45 years. For the victims of poverty and unemployment, there is no point of regretting now."
"The bypolls can be announced any moment now. Under current conditions, in Uttar Pradesh, we have decided to fight the bypolls - which will happen on some seats - all alone," Mayawati told the media.
"Thanks and gratitude to @Mayawati, @yadavakhilesh, @INCIndia, @ncbn and others for expressing solidarity and support to us and the people of #Bengal. EC's biased actions under the directions of the #BJP are a direct attack on democracy. People will give a befitting reply," she tweeted.