The Biden administration is fighting back and appealing a ruling that overturned the federal mask mandate on airlines and public transportation. The administration said it depends on the recommendation of the Centers for Disease Control and Prevention (CDC) for what is best for public health.

The controversy comes after a Florida judge struck down the federal mandate that required passengers to wear face masks on airplanes, in airports and while using other public transportation because of the ongoing COVID-19 pandemic. U.S. District Judge Kathryn Kimball Mizelle declared the mandate, which has been in effect for nearly two years, unlawful.

Airlines immediately rescinded their mask requirements in wake of the decision, while some healthcare groups voiced their opposition. The repeal of the mandate came just days after the CDC extended the mask mandate until at least May 3. The Biden administration said it will appeal the decision if the CDC deems it necessary.

“The Department of Justice and the [CDC] disagree with the district court’s decision and will appeal, subject to CDC’s conclusion that the order remains necessary for public health,” the DOJ said in a statement. “The department continues to believe that the order requiring masking in the transportation corridor is a valid exercise of the authority Congress has given CDC to protect the public health. That is an important authority the department will continue to work to preserve… If CDC concludes that a mandatory order remains necessary for the public’s health after that assessment, the Department of Justice will appeal the district court’s decision.”