Choice-less awareness vs directed

I read that after careful mental noting of experience in mindfulness .One reaches a state of effortless effort and choiceless awareness .So I want clear out if awareness can direct itself without deciding or should it always be consciously directed ?. For example what decides that now awareness has to be shifted from the breath to the body ?.If this decision is unconscious then it isn't wise .And if it's based only on information coming from the breath, then its not a well educated decision. So shouldn't awareness be directed on "**where should it be directed**"?.