Seeking to consolidate its support among the other backward classes (OBC), it passed a separate resolution at its national executive meeting hailing Prime Minister Narendra Modi, who comes from an OBC caste, for the legislation and condemning rivals for blocking it in the Rajya Sabha.
It accused the Congress and other rival parties of being "anti-backward castes".
"It is a must to grant the OBC Commission constitutional status. It will give them justice and help create an equal society. The Congress and other parties have proved that they may preach social justice but practise only vote bank politics. The Congress did not do justice to them when it was in power and continues to do so now," Union Minister Prakash Javadekar told reporters.
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The present commission is "powerless" and cannot do justice to the OBCs, he said, asserting that the central government is firm on the bill's passage. It will give the commission powers similar to the SCs and the STs commissions.
He said the OBC MPs belonging to all parties, including the Congress and the Samajwadi Party, had met Modi recently to press for such a bill but opposition parties stalled it when it was brought.
The Lok Sabha, where the government enjoys a big majority, passed the constitutional amendment bill during the recent Budget Session but the Rajya Sabha, where it is short of a simple majority, stalled it and sent to a parliamentary committee for review and recommendations.
It is not right to oppose such decision only for politics, it said.
It is yet another pro-poor move by the government, the minister said, adding that various bodies, including the Mandal commission, had made such a suggestion.
The resolution moved by Hukumdev Narayan Yadav and seconded by the party's senior OBC leaders, including Madhya Pradesh and Jharkhand chief ministers Shivraj Singh Chouhan and Raghubar Das, said it is after 70 years of Independence, a government has taken this "historic" decision.
Javadekar said the OBC commission will help people irrespective of religions as socially and educationally backward groups of minorities also fall in the OBC category.