Vice reports that SpaceX gave a Friday deadline for two Boca Chica Village homeowners to sell their homes or Elon Musk’s launch provider would pursue “alternate approaches” to get them to vacate the settlement near the company’s south Texas spaceport.

A dispute has erupted between several environmental groups and the federal government over the impact of SpaceX’s test operations at Boca Chica Beach in south Texas.

The issue: the Federal Aviation Administration (FAA) approved SpaceX’s plan to use the coastal site for launching its Falcon 9 and Falcon Heavy rockets up to 12 times per year.

However, Elon Musk’s company has instead been using its facilities to develop and flight test its larger Starship and Super Heavy boosters. The resulting impacts have been much greater than anticipated under the original proposal, environmental groups argue.