How can the executive power be defined for an autonomous State within Assam according to this text?
According to the given text, the executive power for an autonomous State within Assam can be defined by a law passed by Parliament. This law can specify the constitution, powers, and functions of the Council of Ministers for the autonomous state, as well as define the matters with respect to which the executive power will operate, whether to the exclusion of the Legislature of the State of Assam or otherwise.