The resultant proximity to enemy targets also require aircraft that are more robust than other types of military aircraft.

In the US, the FAA requires aircraft to have an airworthiness certificate.

This transition would require military aircraft to file flight plans and obey civilian air traffic controllers.

Airbus executives argue that the steady growth in air travel requires bigger and more efficient aircraft.

The rule as originally proposed would have required aircraft to stay farther away from cliffs, mountains and other sights.

The FAA also required revised aircraft de-icing procedures at airports.

However many countries still require aircraft to be fitted with halon fire suppression systems because no safe and completely satisfactory alternative has been discovered for this application.

Federal regulations require civilian aircraft to keep speeds below 250 miles an hour below 10,000 feet.

Originally aircraft and pilots were assigned directly to artillery or other units requiring light aircraft.

Unfortunately, MLS would also require every airport and aircraft to upgrade their equipment.