50 ILCS 5/2
During the period when the public business is being conducted at the emergency temporary location, or locations, the governing body and other officers of a political subdivision of this State shall have and possess and shall exercise, at such location, or locations, all of the executive, legislative, and judicial powers and functions conferred upon such body and officers by or under the laws of this State. Such powers and functions may be exercised in the light of the exigencies of the emergency situation without regard to or compliance with time-consuming procedures and formalities prescribed by law and pertaining thereto, and all acts of such body and officers shall be valid and binding as if performed within the territorial limits of their political subdivision.
50 ILCS 5/2