ANNEX III U.K. II/SI code operation referred to in Article 3(2)

5. Mode S interrogators, when operating with an II code and if enabled by an appropriate operational parameter, shall be configurable by the operator to either: U.K.

• not use lockout for transponders which report no SI capability in their data link capability report or cannot report their data link capability, or

• use intermittent lockout for transponders which report no SI capability in their data link capability report or cannot report their data link capability.