Security measures taken by the Swiss authorities against criminal and terrorist acts at airports have been rated efficient and complete by an international audit.

But experts from the International Civil Aviation Organization (ICAO) called for clarifications on security standards in basic documents of the Federal Civil Aviation Office.

The office pledged to implement the suggestions by the United Nations body which defines security norms around the world.

ICAO experts visited Switzerland in October to check the application of the security rules at the main airport of Zurich, as well as evaluations of how well Swiss legislation integrated ICAO norms and of the training of staff.

According to the Federal Civil Aviation Office, the number new security measures aimed to preventing criminal acts have increased substantially.

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