30-9A-501. Filing office. (1) Except as otherwise provided in subsection (2), 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:
(a) the office designated for the filing or recording of a mortgage on the real property if:
(i) the collateral is as-extracted collateral or timber to be cut; or
(ii) the financing statement is filed as a fixture filing and the collateral is goods that are or are to become fixtures; or
(b) the office of secretary of state in all other cases, including if the collateral is goods that are or are to become fixtures and the financing statement is not filed as a fixture filing.
(2) 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 secretary of state. The financing statement also constitutes a fixture filing as to the collateral indicated in the financing statement that is or is to become fixtures.
(3) The office in which a financial institution is required to file an effective financing statement, as defined in 7 U.S.C. 1631, is the office of the secretary of state.