Anyone flying domestically in the United States should now have a REAL ID. The policy, which has been in discussion for 20 years, officially took effect on Wednesday after several deadline extensions.

The Department of Homeland Security said a REAL ID is a more secure form of identification. It’s a federally compliant state-issued license. Most REAL IDs will have a star in the upper-right corner.

Some states, including New York, also offer Enhanced IDs, which allow flying domestically and crossing into Canada and Mexico on the ground. However, you can’t fly into those countries. Those IDs will likely have an American flag.

As NewsChannel 13 has been reporting, the looming deadline led to a scramble to get the new IDs.

Travelers without REAL IDs will be allowed to travel for now, the Department of Homeland Security said in a last-minute announcement on Tuesday. However, they may face additional security.

There are currently 81% of people with acceptable IDs, according to Homeland Security Secretary Kristi Noem. Passports and tribal identification will also be accepted, she said. If you still need a REAL ID, you can apply through the Department of Motor Vehicles.