There is a lot to be said for leaving it up to the people to decide and letting them take the consequences of who they vote onto a particular body. There are plenty of other candidates who will make the point if someone is going to sit in two places. It is not something against which we should be legislating. I do not see the reasoning behind the proposal, apart from a judgment that a person would be living in an area and that a town and city council would be geographically removed from each other.