However, the strategy has been applied only in limited cases.
Until now such technology has been applied only to far pricier cars.
Habeas corpus, which governs against unlawful detention, has before now been applied only to humans.
Level 7 has been applied only to the disaster at Chernobyl, in the former Soviet Union.
In general, such restrictions have been applied only to covert operations and ongoing espionage investigations, Congressional officials say.
And those kinds of treatments actually seem to work, although they have been applied only a few times.
Take the UN Gender Marker for example: until recently that has been applied only at proposal stage with no follow-up on implementation.
Officials say the spending restrictions have been applied only to the schools and libraries and to relatively small rural health care programs.
Until now, this method has been applied only in a small number of cases, generally for forecasts in hindsight.
So far, the rules have been applied only to flights within Europe, and European carriers and most non-European airlines have complied.
Deutsche Telekom said that soaring data traffic, which is expected to quadruple by 2016, would force it to impose limits that had been applied only to mobile users.
