The backstory here is that the European Union wants to create a functional free and open market that allows competition to flourish. But some nations, looking to host big name companies, could be tempted to either give them a whopping tax break or actively fund their development costs. These deals, known as "state aid," are known to distort the market and make the playing field far more uneven than it should be.

Back in 1991, Apple signed a deal with the Irish government that let it use a special tax loophole called the "double Irish." It's believed that Apple has used the loophole to store two thirds of its non-US profits inside this tax haven. The result is that Ireland essentially turned a blind eye to the better part of $14.5 billion that it would have been owed had the loophole not existed. The EU opened an investigation into the deal in 2013, and in 2016 demanded that Ireland collect the cash.

Ireland doesn't feel that it's doing anything wrong, and has appealed the decision of the court declaring the tax break as illegal. As The Independent points out, Ireland relies on foreign investment for many of its jobs, and doesn't want to collect the cash for fear of alienating other businesses. That said, the country has pledged to collect the tax, but claims that it won't be in a position to know how much it will ask for until March 2018. That's not good enough for Vestager or the law, which says that EU states have just four months from the decision to get moving -- meaning that Ireland should have sent a strongly-worded letter to Apple by January of this year.

The issue of Apple's taxation is a contentious one, but the company has drawn ire even in the United States. In 2013, Senator Carl Levin penned a report examining that Apple managed to negotiate its global tax rate down to just two percent. In the US, it would have to pay at least 15 percent. Tim Cook, however, believes that Apple should only be taxed where its value is created -- i.e. only at the company's R&D sites in California.

In response, Ireland's Department of Finance said that it is complying with its obligations, even if it doesn't agree with the decision of the court. It feels that Vestager's decision to hurry the process along is "extremely regrettable," since parsing out $14.5 billion in tax is pretty complex. It'll be interesting to see how this plays out, and how it effects Ireland's relationship with the technology giant going forward.