Officials said they had no record of a finding, which gives presidential authorization to covert activities.

Presumably, such a defense is not available to those operating exclusively under presidential authorization.

An attack on the missile sites, however, would require express Presidential authorization.

It was the "football," holding the codes that would grant Presidential authorization for a nuclear weapons release.

"We all have the highest clearances and presidential authorization," Arthur reminded him.

It took a presidential authorization to begin off-range flights.

Today, receiving presidential authorization was far from Captain Auton's mind.

On a number of cases, US special operations forces had to wait for Presidential authorization to make an attack, or even move to staging areas.

The November arms shipment had caused great anxiety within the agency because it was carried out without specific Presidential authorization.

"We need presidential authorization for that," Ed warned.