(5 ILCS 175/5-120)
    Sec. 5-120. Electronic signatures.
    (a) Where a rule of law requires a signature, or provides for certain consequences if a document is not signed, an electronic signature satisfies that rule of law.
    (a-5) In the course of exercising any permitting, licensing, or other regulatory function, a municipality may accept, but shall not require, documents with an electronic signature, including, but not limited to, the technical submissions of a design professional with an electronic signature.
    (b) An electronic signature may be proved in any manner, including by showing that a procedure existed by which a party must of necessity have executed a symbol or security procedure for the purpose of verifying that an electronic record is that of such party in order to proceed further with a transaction.
    (c) The provisions of this Section shall not apply:
        (1) when its application would involve a construction
of a rule of law that is clearly inconsistent with the manifest intent of the lawmaking body or repugnant to the context of the same rule of law, provided that the mere requirement of a "signature" or that a record be "signed" shall not by itself be sufficient to establish such intent;
        (2) to any rule of law governing the creation or
execution of a will or trust; and
        (3) to any record that serves as a unique and
transferable instrument of rights and obligations including, without limitation, negotiable instruments and other instruments of title wherein possession of the instrument is deemed to confer title, unless an electronic version of such record is created, stored, and transferred in a manner that allows for the existence of only one unique, identifiable, and unalterable original with the functional attributes of an equivalent physical instrument, that can be possessed by only one person, and which cannot be copied except in a form that is readily identifiable as a copy.
(Source: P.A. 101-163, eff. 1-1-20.)