An opinion issued by the European Court of Justice on May 11 could prevent people from using or working for services such as Uber and Airbnb.

The opinion from the Advocate General of the European Court of Justice follows a case that has been brought by Spanish taxi drivers against the ride sharing service Uber. It found that Uber should be regulated like a transportation company, not as an “information society service”.

If the opinion is upheld, these services could be required to apply for specific licences or be restricted in number as is the case with taxis in various European cities in an attempt to keep prices artificially high.

The court is slated to deliver a final ruling on whether Uber should be classified as a transport company or as a passive internet intermediary, in the coming months.

Usually, the judges follow the opinion of the Advocate General.

It remains to be seen whether the case will impact other so-called sharing economy services as Airbnb.

Speaking after the opinion was issued, Dan Dalton, European Conservatives and Reformists (ECR) spokesman on the EU internal market said: “The opinion given today has huge implications for innovative, consumer driven digital services all across Europe… It is right that there are safeguards for consumers, but applying analogue era regulation to the digital world only strangles innovation and entrenches privileged monopolies.”