The rules that use the category "<det-not_indef-sing>" are:

<unit-not_except>

<det-not_indef-sing> <unit_nom-not_det-sing>

<unit-sing>

<det-not_indef-sing> <unit_nom-not_det-sing>

<unit>

<det-not_indef-sing> <unit_nom-not_det-sing>