What's the statue of limitations if my HOA refuses to act on a CC&R violation?

An owner in my condo building subdivided a unit in violation of the CC&Rs. (It's also in violation of city code, but the city inspector says it's too minor to warrant the expense of enforcement!) The HOA Board keeps promising to compel the owner to restore the unit to its original configuration, but does nothing. Is there a statute of limitations in this situation? How long can this go on before the statute of limitations is reached?