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"A gathering of Angels appeared above my head. They sang to me this song of hope, and this is what they said..." -Styx

Aban's Illustration www.thespeakeasy.com/alanfore

In the TOS movies, the jumpsuits used were never seen on a character that would have been identified as a commissioned officer, unless one counts Janice Rand in ST4 as one (there is lots of confusion on when exactly she transformed from NCO to commissioned officer). And nobody who wore the black trousers and blood tunic was ever identified as enlisted.

As far as dialogue references go, TOS used the generic "crewman" and "chief" but did not make clear if these really were enlisted personnel, or just some futuristic Starfleetspeak for low-ranking commissioned officers. But the very first pilot episode, "The Cage", explicitly listed a CPO Garrison in the end credits...