Legal number of non relatives living in one house

[David Elefant]

Hey guys I'm a rental real estate newbie and while listening to a podcast I heard someone talking about how they were dealing with an issue in Oregon related to the number of non relatives he had living in one house. I was wondering if this is a real concern and if so, does anyone know the legal number of non relatives that can be living under one roof, specifically in the area of Syracuse New York? And what about if it is one house that has been legally split into a dual occupancy? Does that make it a two unit complex, and how would that affect the legal number of non relatives?