active duty

:  characterized by action rather than by contemplation or speculation

:  producing or involving action or movement

:  asserting that the person or thing represented by the grammatical subject performs the action represented by the verb

:  conduct due to parents and superiors :  respect

:  obligatory tasks, conduct, service, or functions that arise from one's position (as in life or in a group)

:  assigned service or business

:  done as a duty

:  being on duty :  assigned to specified tasks or functions