Upping the ante, former Indian Space Research Organisation (Isro) Chairman G Madhavan Nair on Monday moved the Central Administrative Tribunal (CAT), challenging the government's decision to bar him from holding government posts for his alleged role in the controversial Antrix-Devas deal and seeking its quashing. In a petition, Nair sought quashing of chapter 6 of the September 2, 2011, report of the high-level team constituted by the government to examine the facts and circumstances of agreement between Antrix and Devas Multi Media Private Ltd. Nair, who is peeved at the government action, sought quashing of the January 13 order excluding him from right for re-employment, committee roles or any other important role under government and its bodies and divesting him of any current assignment with government and its organisations.