Nearly two decades after Congress passed the Real ID Act, the law is finally set to be enforced.
Starting Wednesday, the Transportation Security Administration will begin checking for Real ID-compliant identification at airport checkpoints.
Homeland Security Secretary Kristi Noem told Congress on Tuesday that the government understands not everyone has been able to obtain a Real ID. Those travelers will still be allowed to fly but will be directed to a separate line for additional screening, she said.
Recent TSA data shows that only 80% of travelers have an acceptable form of ID.
How to tell if an ID is Real ID-compliant
Travelers can check the top of a driver's license or state-issued ID card. If it has a star, the ID meets federal Real ID requirements.
Other types of IDs that TSA will accept
- State-issued Enhanced Driver's License (EDL) or Enhanced ID (EID)
 - U.S. passport
 - U.S. passport card
 - DHS trusted traveler cards (Global Entry, NEXUS, SENTRI, FAST)
 - U.S. Department of Defense ID, including IDs issued to dependents
 - Permanent resident card
 - Border crossing card
 - An acceptable photo ID issued by a federally recognized Tribal Nation/Indian Tribe, including Enhanced Tribal Cards (ETCs).
 - HSPD-12 PIV card
 - Foreign government-issued passport
 - Canadian provincial driver's license or Indian and Northern Affairs Canada card
 - Transportation worker identification credential
 - U.S. Citizenship and Immigration Services Employment Authorization Card (I-766)
 - U.S. Merchant Mariner Credential
 - Veteran Health Identification Card (VHIC)
 
What about children?
Children under 18 are not required to show identification when traveling domestically, according to the TSA.