Sorcery wrote:

So I'm guessing Romulans are forbidden to enlist in Starfleet?
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Not necessarily, but the Romulan in question would have to have quite a compelling story to allow him/her to enlist without suspicion of them being a Tal Shiar agent.
Perhaps this Romulan's family was exiled from or defected from the Star Empire, and he grew up in Federation space?