405 ILCS 5/5-110

Services charges against responsible relatives take effect on the date of admission or acceptance of the recipient for services or as soon thereafter as each responsible relative's financial ability during the period which the recipient receives services subjects him to liability for charges as required under this Act. Payment in full by a responsible relative of established services charges as provided in this Act constitutes full discharge of the liability of such responsible relative, unless there has been material misrepresentation in revealing the extent of financial resources.