The rules that use the vocabulary item "over" are:

<air_closing>

over

over and out

<bomb_damage_score>

<up_to_two_digits> over one hundred

<scale_operation-gapsout_null-gapsin_null>

<change_parameter> scale to one over <scale_number-gapsout_null-gapsin_null>

set scale to one over <scale_number-gapsout_null-gapsin_null>