As I understand it, any property that has not been rented out for two years is not subject to the rental cap, so there is unlikely to be an issue with this.
This assumes of course that there is no change of govt in the next 2 years. But even there, looking at Sinn Fein's time in government in the north, is marked by a level of inertia that would make Belarus blush, so its possible even they might leave that condition untouched, however they might promise now.