Updated

A senior Obama administration official told Fox News on Tuesday the Transportation Security Administration will pro-actively implement a new requirement for airlines when it comes to vetting expedited additions to the No Fly list.

Currently, airlines are required to re-check the list within 24 hours.

Under the new measure, they will be required to check within 2 hours of being electronically notified of a special circumstance expedited No Fly name, such as the one Monday, Faisal Shahzad.

As we saw with Shahzad, in an expedited no fly nomination, the airline is responsible for manually checking the name against the no fly list within 24 hours. In his case, the airline seemingly didn't check the name, and the suspect was allowed to purchase a ticket and obtain a boarding pass.

Under the new measure, the airline would be required to re-check the list within 2 hours of being notified of a special circumstance expedited No Fly name.