Using a two family as a three family

[Abe B.]

Hi, I am considering a two-unit that is zoned r2 and is being used as a three-unit. (There is no basement unit).

how does this work in Providence? Is there a process for making this legal, or am I SOL and would have to evict the illegal unit?

To be clear, I'm looking for specific info to Providence, RI - and not general advice. I'd like to do my homework before approaching the zoning board.

thanks!