Airbnb Inc. should not be subject to the same regulations as real estate agents and instead should be treated as a digital service provider, free to operate across the European Union, an adviser to the European Union’s highest court said on Tuesday.

The opinion, issued by one of the European Court of Justice’s advocates general, Maciej Szpunar, increases the likelihood that the full court will rule that Airbnb should not be subject to the same rules as real-estate agents. Advocate general opinions are not binding on the court but are followed in more than 70 percent of cases.