U.S. Homeland Security Secretary Kristi Noem said air travelers starting Wednesday who do not have enhanced ID cards may face enhanced security procedures but will not be denied access to flights.

The Transportation Security Administration warned people who don’t have the REAL ID to show up early and be prepared for advanced screening to avoid causing delays. “I do not have a belief that this will cause people to miss their flights if they take that additional time in,

Kristi Noem, the secretary of homeland security, said that travelers without a federally recognized document would face additional screening on Wednesday but would not be barred from flights.