The rules that use the category "<digit-not_zero-sing>" are:

<contact_type-simple>

<digit-not_zero-sing> <contact_type_nom-sing>

<up_to_two_digits-sing>

<digit-not_zero-sing>

<tens_number-sing>

<digit-not_zero-sing>

<contact_type-sing-neutral>

<digit-not_zero-sing> <contact_type_nom-sing-neutral>

<contact_type-point_id_type_none-simple>

<digit-not_zero-sing> <contact_type_nom-point_id_type_none-sing>

<contact_type-point_id_type_none-sing-simple-neutral>

<digit-not_zero-sing> <contact_type_nom-point_id_type_none-sing-neutral>

<contact_type>

<digit-not_zero-sing> <contact_type_nom-point_id_type_none-sing>

<digit-not_zero-sing> <contact_type_nom-sing>

<contact_type-point_id_type_none>

<digit-not_zero-sing> <contact_type_nom-point_id_type_none-sing>

<contact_type-point_id_type_none-sing-neutral>

<digit-not_zero-sing> <contact_type_nom-point_id_type_none-sing-neutral>