The rules that use the vocabulary item "non-combatant" are:

<rotary_aircraft_type>

non-combatant copter

non-combatant copters

non-combatant helicopter

non-combatant helicopters

non-combatant helo

non-combatant heloes

<rotary_aircraft_type-sing>

non-combatant copter

non-combatant helicopter

non-combatant helo

<vehicle_echelon>

non-combatant convoy

<rotary_aircraft_type-pl>

non-combatant copters

non-combatant helicopters

non-combatant heloes