A Presidential Determination issued by the White House stating determination resulting in an official policy or position of the executive branch of the United States government. Presidential determinations may involve any number of actions, including setting or changing policy, or any number of other exercises of executive power.
One of the most famous presidential determinations was President Clinton's Presidential Determination 95-45, which exempted the US Air Force's facility in the vicinity of Groom Lake, Nevada (commonly called Area 51)
A presidential determination is distinguished from an executive order, which is a specific directive issued by the President of the United States to part of the executive branch.