I don't know about KY specifically, but in a lot of states (most? all?) they have requirements if the family is receiving housing assistance. Not otherwise. I'm in OH and I don't get housing assistance, but I do live in a complex with upper and lower income requirements. With a boy and a girl, I had my choice between the 2 bd and the 3 bd. They don't give a hoot if I want my boy and girl in the same room. In the complex right across the street, that is income based (rent is lowered to fit your income), I would have HAD to have a 3 bd based on the boy/girl rule.