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

<unit_name_mod>

<name_adj> <track_designation>

<name_operation>

<naming_verb> it <track_designation>

<unit-sing>

<track_designation>

<unit>

<track_designation>

<unit_call_sign_list>

<track_designation>

<track_designation> <unit_call_sign_list>