Answers: yes and no
Of course the power comes from the locomotive.
All that can happen, and does frequently is the member of staff on the caboose can relay instructions via radio to the engineer what he requires. Faster, slower, etc.
Most special instructions require movement beside a caboose on the "point" to be at a considerably slower speed than when operated contained by the normal attitude.
The caboose is equipped with a wimpy nouns operated whistle and emergency brake tap.
This is mostly done on branch lines or local work service where long back-up moves are required.
obviously it can, they just push instead of verbs
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