using these structures versus established IP-based BEPS tools. Solutions such as the Orphaned Super-QIAIF have been created in the Irish tax code to resolve this. However, while Debt-based BEPS tools may not feature with U.S. multinational technology companies, they have become attractive to global financial institutions (who do not need to meet the same "substance" tests on their financial transactions). In February 2018, the Central Bank of Ireland upgraded the little-used Irish L-QIAIF regime to offer the same tax benefits as Section 110 SPVs but without the need for Profit Participation Notes and without the need to file public accounts with the Irish CRO (which had exposed the scale of Irish domestic taxes Section 110 SPVs had been used to avoid, see abuses). Ranking corporate tax havens Proxy tests The study and identification of modern corporate tax havens are still developing. Traditional qualitative-driven IMF-OCED-Financial Secrecy Index type tax haven screens, which focus on assessing legal and tax structures, are less effective given the high levels of transparency and OECD-compliance in modern corporate tax havens (i.e. most of their BEPS tools are OECD-whitelisted). Quantitative measures More scientific, are the quantitative-driven studies (focused on empirical outcomes), such as the work by the University of Amsterdam's CORPNET in Conduit and Sink OFCs, and by University of Berkley's Gabriel Zucman. They highlight the following modern corporate tax havens, also called Conduit OFCs, and also highlight their "partnerships" with key traditional tax havens, called Sink OFCs: The only jurisdiction from the above list of major global corporate tax havens that makes an occasional appearance in OECD-IMF tax haven lists is Switzerland. These jurisdictions are the leaders in IP-based BEPS tools and use of intergroup IP charging and have the most sophisticated IP legislation. They have the largest tax treaty networks and all follow the approach. The analysis highlights the difference between "suspected" onshore tax havens (i.e. major Sink OFCs Luxembourg and Hong Kong), which because of their suspicion, have limited/restricted bilateral tax treaties (as countries are wary of them), and the Conduit OFCs, which have less "suspicion" and therefore the most extensive bilateral tax treaties. Corporates need the broadest tax treaties for their BEPS tools, and therefore prefer to base themselves in Conduit OFCs (Ireland and Singapore), which can then route the corporate's funds to the Sink OFCs (Luxembourg and Hong Kong). Of the major Sink OFCs, they span a range between traditional tax havens