The current NDA government had in August last year supported before the apex court the UPA regime's decision to include the Jat community in the Central OBC list.
It had said that the Cabinet took into account the findings of the report of an expert committee constituted by the Indian Council for Social Science and Research (ICSSR) before taking the decision.
It had said that the government rejected the view of the National Commission for Backward Classes and took the decision on the basis of findings of the expert committee.
The affidavit was filed in compliance with apex court's order, issuing notice to the Centre on the PIl.
Besides the organisation, three other individuals from Delhi - Ram Singh, Ashok Kumar and Ashok Yadav - belonging to OBC category have also challenged the Centre's notification.
They submitted that members of Jat community have performed much better than those of other castes.
They have sought a direction holding that Jat community is not a backward class and is not entitled to be included in the list of OBC, and annexed findings of the NCBC, which in its February 26, 2014 report had rejected the Centre's request for recommending inclusion of Jat community in the central list of backward classes.