The enactment of GST last year was initially touted as a success story for cooperative federalism, particularly because federalism and the rights of states were leitmotifs of PM Narendra Modi’s poll campaign. The mantle of carrying this idea forward fell on the Niti Aayog, which added competitive federalism to the matrix. It is becoming clear now that there are federal deficit in the way the GST has been conceptualised and operationalised, starting from how the GST Council has been constituted and decisions taken.