Can I reject applicants based on too many adult tenants?

[Shawn H.]

If I understand correctly, I can set the maximum # of occupants per unit. Can I also include maximum # of adults. For example: Prospective tenants are 2 married adults, they have 2 sons, 21 and 24. One of the sons has a child, which would be there some of the time. I can't reject based on income. I have heard from RE agents, not previous landlords, that this family has a history of damaging properties.