Update: Comments from Amanda Hamilton of Konicek & Dillon about the court's decision were added to the second to last paragraph.SPRINGFIELD — Fee-sharing contracts between two law firms, when the primary service of one firm is referring clients to the other, are not invalidated if the attorneys do not specifically include a written statement of joint financial responsibility, according to an opinion issued by the Illinois Supreme Court today.The state’s high court ruled in an unanimous 18-page decision …