Most countries' company law has a clause that says if you violate company boundaries like this, they're effectively one company. Otherwise you could use this so

Most countries' company law has a clause that says if you violate company boundaries like this, they're effectively one company. Otherwise you could use this sort of thing to limit your liability well in excess of intended (the primary purpose of company law is to establish carve-outs in which you can perform business with limited liability).