Switzerland was highly tied to Sink OFC Jersey. Conduit OFC Ireland was tied to Sink OFC Luxembourg, while Conduit OFC Singapore was connected to Sink OFCs Taiwan and Hong Kong (the study clarified that Luxembourg and Hong Kong were more like traditional tax havens). The separation of tax havens into Conduit OFCs and Sink OFCs, enables the corporate tax haven specialist to promote "respectability" and maintain OECD-compliance (critical to extracting untaxed profits from higher-taxed jurisdictions via cross-border intergroup IP charging), while enabling the corporate to still access the benefits of a full tax haven (via double Irish, dutch sandwich type BEPS tools), as needed. We increasingly find offshore magic circle law firms, such as Maples and Calder and Appleby, setting up offices in major Conduit OFCs, such as Ireland. Employment tax Several modern corporate tax havens, such as Singapore and the United Kingdom, ask that in return for corporates using their IP-based BEPS tools, they must perform "work" on the IP in the jurisdiction of the haven. The corporation thus pays an effective "employment tax" of circa 2–3% by having to hire staff in the corporate tax haven. This gives the haven more respectability (i.e. not a "brass plate" location), and gives the corporate additional "substance" against challenges by taxing authorities. The OECD's Article 5 of the MLI supports havens with "employment taxes" at the expense of traditional tax havens. Irish IP-based BEPS tools (e.g. the "capital allowances for intangible assets" BEPS scheme), have the need to perform a "relevant trade" and "relevant activities" on Irish-based IP, encoded in their legislation, which requires specified employment levels and salary levels (discussed here), which roughly equates to an "employment tax" of circa 2–3% of profits (based on Apple and Google in Ireland). For example, Apple employs 6,000 people in Ireland, mostly in the Apple Hollyhill Cork plant. The Cork plant is Apple's only self-operated manufacturing plant in the world (i.e. Apple almost always contracts to 3rd party manufacturers). It is considered a low-technology facility, building iMacs to order by hand, and in this regard is more akin to a global logistics hub for Apple (albeit located on the "island" of Ireland). No research is carried out in the facility. Unusually for a plant, over 700 of the 6,000 employees work from home (the largest remote percentage of any Irish technology company). When the EU Commission completed their State aid investigation into Apple,