Annex III Performance requirements referred to in Article 4(4)

Individual systems used for the assignment of SSR codes shall have the following functional capabilities:

1. (a)

   SSR codes shall be automatically assigned to aircraft in compliance with a code allocation list agreed by F1the United Kingdom and Member States and coordinated with European third countries;

2. (b)

   SSR codes assigned to aircraft being transferred from air navigation service providers in neighbouring States shall be checked to see if the assignments can be retained in compliance with a code allocation list agreed by F2the United Kingdom and Member States and coordinated with European third countries;

3. (c)

   SSR codes shall be classified into different categories to allow for differentiated code assignment;

4. (d)

   SSR codes from the different categories referred to in point (c) shall be assigned according to the directions of flights;

5. (e)

   multiple simultaneous assignments of the same SSR code shall be made to flights operating in conflict-free directions.