The rules that use the vocabulary item "low" are:

<point_id-entry_point>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-craft_landing_zone>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-checkpoint>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-waypoint>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-cap>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-point_id_type_none>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-debark_point>

black low

blue low

green low

pink low

tweety one low

yellow low

<altitude_descriptor>

low

<point_id-embark_point>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-bullseye>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-coordination_point>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-base_of_fire>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-initial_point>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-holding_point>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-landing_zone>

black low

blue low

green low

pink low

tweety one low

yellow low

<point_id-homebase>

black low

blue low

green low

pink low

tweety one low

yellow low