ARTCCs shall furnish AMIS on all known aircraft operating in an ADIZ on a track toward the US, except in which of the following cases?

The correct choice relates to specific operational protocols regarding the provision of Aircraft Movement Information System (AMIS) data to Air Route Traffic Control Centers (ARTCCs).

When aircraft are operating at a True Airspeed of less than 180 knots, they may be deemed less of a concern for immediate tracking in relation to the air defense identification zone (ADIZ) procedures. The reasoning is that slower aircraft generally pose less risk of rapidly approaching the U.S. or engaging in potentially hostile actions. Therefore, under normal circumstances, ARTCCs are not required to furnish AMIS for these slower-moving inbound aircraft unless there are additional mitigating factors present, such as a change in the aircraft's situation or mission profile.

This provision allows ARTCCs to allocate their resources and attention to tracking faster, potentially more threatening aircraft while still maintaining overall situational awareness. This specific requirement emphasizes the management of air traffic and resource deployment in an efficient manner and prioritizes more urgent operational needs.