There is no time limit on a legal separation in Illinois. That means you could be legally separated indefinitely if you so choose. It is important to note that during the separation period, you and your spouse are both bound by the terms of the legal separation agreement. Any changes to the agreement need to be made through the court system and would require the agreement of your spouse or the approval of the court. Finally, you or your spouse may proceed to terminate the marriage by filing for divorce at any time subsequent to entry of your separation order.