A trial set to begin Monday in a Florida lawsuit against Airbnb will test the extent of its protections under a landmark 1996 law that shields the operators of U.S. internet sites from legal liability for content posted by users.

Aimco — an apartment-rental company with sites in 17 states — claims in the action filed in state court in Miami-Dade County that Airbnb knowingly allowed hosts to offer Aimco properties despite its ban on short-term rentals. Aimco lost a similar suit in California after a federal judge agreed with Airbnb that it’s shielded by the 1996 law, known as the Communications Decency Act, which paved the way for the rise of businesses like Amazon, eBay and Craigslist and is fiercely protected by the technology industry.