Cabinet Secretary
Bureaucratic executive
Government of India (Transaction of Business) Rules, 1961
De jure
40
De facto
60
Volatility
30
Legitimacy
55
In theory
Senior-most civil servant, head of the civil services, coordinates and secretariat-supports the Cabinet.
In practice
Not a constitutional office (created by rules of business, not the Constitution itself) but functions as the top administrative link between the political executive and the permanent bureaucracy; influence depends heavily on personal rapport with the PM's office rather than any codified independent power.