As stated in the decision of Gambotto v WCP Ltd (1995) 182 CLR 432 at 447:

A share is liable to modification or destruction in appropriate circumstances but is more than a 'capitalised dividend stream,' it is a form of investment that confers proprietary rights in the investor.

With reference to the above, case law and statute as necessary, analyse:

1. the decision of Gambotto and explain the two-step test laid down by the High Court in relation to constitutional alterations taking away minority shareholding;
2. who bears the onus of proof in determining that a constitutional alteration taking away minority shareholding is valid and why;