The rules that use the category "<point_location_mod-gapsout_null-gapsin_null>" are:

<postnommod-enemy>

<enemy_mod> <point_location_mod-gapsout_null-gapsin_null>

<item-not_call_sign>

<det-sing> <item_n-sing> <point_location_mod-gapsout_null-gapsin_null>

<item_n> <point_location_mod-gapsout_null-gapsin_null>

<airspace_clearance>

<clearance_verb> <airspace_entry_mod> <point_location_mod-gapsout_null-gapsin_null>

<unit_mod-gapsout_null-gapsin_null>

<point_location_mod-gapsout_null-gapsin_null>

<point_mod-gapsout_null-gapsin_null>

<point_location_mod-gapsout_null-gapsin_null>

<airspace_clearance-recursive>

<clearance_verb> <airspace_entry_mod> <point_location_mod-gapsout_null-gapsin_null>