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

<atf_noun-pl>

amphibious task forces

<battalion_echelon>

task force field train

<atf_noun>

amphibious task force

amphibious task forces

<atf_noun-sing>

amphibious task force

<listable_things>

task authorizations

task frames

<css_section_echelon>

task force field trains cp