ATC
International Security Notams Format Revised
The ZZZ identifier will no longer be valid.

On November 16 the U.S. began issuing international security notams under the accountability/location identifier of KICZ, replacing the use of ZZZ, which are no longer valid. Reference to flight information regions (FIRs) will also employ KICZ. The use of KFDC remains unchanged. However, the identifier of KICZ as the FIR in a notam’s “Q” line (the line containing information about who the notam affects along with a basic notam description) will be applied in lieu of KFDC, but only for international security notams. 


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