Advice on smoking relatives


My brother wants to visit once my baby is here which I am fine with, however, he's a smoker. He won't smoke inside my house but I'm just wondering if anyone has made any boundaries/ rules for relatives and babies. Since it's winter I imagine he'd wear a coat while smoking outside and then once he comes inside he would take his coat off. Is that and washing his hands sufficient? Thoughts and advice are appreciated. I'm not going to tell him he can't hold his nephew. Baby will be about 2 weeks old when he's here.