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In terms of your 3rd question, I reckon you answered it yourself, the Australian capital markets are an easy path for USA and European companies to a public listing . We've seen a number of Israeli and US companies raise capital here in Aus in recent times.
In terms of conflicting legislations etc, Adrian Trevisan , the CEO of NTI, Is in many respects a true international citizen and therefore its of little wonder that Malta, a recognised tax haven, features in the company structure. I think you'll find that worldwide profits, including the Italian profits you mention, will be used to pay royalties to the Maltese company for use of its intellectual property. I don't think I need to spell out to you why a company would use pay big royalties to its parent company in Malta.