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

<controller_flight_advisory>

cleared hot

cleared to engage

cleared to fire

cleared to join

cleared to region

cleared to switch

<controller_flight_advisory-proceed_as_briefed>

cleared to switch

<controller_flight_advisory-not_recursive-adj>

cleared hot

cleared to engage

cleared to fire

cleared to join

cleared to region

cleared to switch

<controller_flight_advisory-recursive-proceed_as_briefed>

cleared to switch

<controller_flight_advisory-not_recursive-adj-proceed_as_briefed>

cleared to switch

<clearance_verb>

cleared