(810 ILCS 5/9-501) (from Ch. 26, par. 9-501)
    Sec. 9-501. Filing office.
    (a) Filing offices. Except as otherwise provided in subsection (b), if the local law of this State governs perfection of a security interest or agricultural lien, the office in which to file a financing statement to perfect the security interest or agricultural lien is:
        (1) the office designated for the filing or recording
    
of a record of a mortgage on the related real property, if:
            (A) the collateral is as-extracted collateral or
        
timber to be cut; or
            (B) the financing statement is filed as a fixture
        
filing and the collateral is goods that are or are to become fixtures; or
        (2) the office of the Secretary of State in all other
    
cases, including a case in which the collateral is goods that are or are to become fixtures and the financing statement is not filed as a fixture filing.
    (b) Filing office for transmitting utilities. The office in which to file a financing statement to perfect a security interest in collateral, including fixtures, of a transmitting utility is the office of the Secretary of State. The financing statement also constitutes a fixture filing as to the collateral indicated in the financing statement which is or is to become fixtures.
(Source: P.A. 91-357, eff. 7-29-99; 91-893, eff. 7-1-01.)