The rules that use the category "<formation_mod>" are:

<assault_command>

<assault_command> <formation_mod>

<unit_mod-gapsout_np_gap-gapsin_np_gap>

<formation_mod>

<unit_mod-gapsout_null-gapsin_null>

<formation_mod>

<move_mod-gapsout_pp_gap-gapsin_pp_gap-not_compass_direction>

<formation_mod>

<move_mod-gapsout_null-gapsin_null-not_compass_direction>

<formation_mod>

<move_mod-gapsout_np_gap-gapsin_np_gap-not_compass_direction>

<formation_mod>