Question

how relevant is irc v duke of westminster [1936] ac 1 principle today in australia?

Answer 1

The principle in the IRC vs Duke of Westminster 1936 ac 1 is following – The principle was that one person can manage the financial affairs to pay lesser tax.  

If the person be able to do that, he can never be punished according to taxation laws.

The law became later irrelevant after introducing the Ramsay Principle of taxation i.e. corrective actions of the taxpayer