35 ILCS 746/47-10: Tax liability postponed.

(a) During the period during which a person was unlawfully or wrongfully detained abroad or held hostage abroad, any tax liability of that person shall be postponed until 90 days after the person is no longer unlawfully or wrongfully detained or held hostage abroad. The person shall be exempt from paying any interest or penalty that accrues while the tax liability is postponed. Notwithstanding any provision of law to the contrary, property owned by such a person shall not be sold for taxes pursuant to Section 21-205 of the Property Tax Code during the period that the tax liability is postponed.

(b) The provisions of subsection (a) of this Section shall also apply to the spouse of any person who is entitled to the benefits under subsection (a)