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

<n>

<unit_nom>

<n-not_proper_name>

<unit_nom>

<n-unit>

<unit_nom>

<unit-gapsout_null-gapsin_null>

<unit_nom>

<n-not_mod-not_proper_name>

<unit_nom>

<n-not_proper_name-unit>

<unit_nom>

<n-not_mod-not_proper_name-unit>

<unit_nom>