CA-Final
657 Points
Posted on 17 June 2013
In most simple words,
Name of Game eg. Chess is an ACT
How to play this game is called Rules.
Similarly Income Tax Act is a name and rules prescribes its procedures.
Act is passed by Parliament whereas Rules are made by Board (here CBDT).
Please note that Act is a wider term and any Rules can not go beyond the powers given in Act.