How Property Division Is Decided in Illinois Common Law Marriage When dividing property during a divorce case. Spousal Support Attorneys will explain Both spouses’ contribution to the acquisition, maintenance, reduction, or increase in value of the marital or non-marital property. At the Law Office of Fedor Kozlov, P.C., they are a group of dedicated and compassionate attorneys who are experienced in providing individualized solutions. in Lawyerwith spousal-support-attorneys.