Business travelers with a proclivity for barely making their flights beware: Come Oct. 1, a new form of identification will be required to board domestic air flights. It is one that tens of thousands of travelers may not possess, an update sure to make life stressful for airport security workers as wait times at security checkpoints become lengthy.

“As many as 80,000 travelers, based upon our economic analysis, could show up on Oct. 1, 2020, without having the needed form of identification to get through security checkpoint,” said Tori Emerson Barnes, executive vice president of public affairs and policy at the U.S. Travel Association, an organization representing the travel industry.