§ 9-501. FILING OFFICE.
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:
(A) the collateral is as-extracted collateral or timber to be cut; or
(2) the office of [or any office duly authorized by [ ]], 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.
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 financing statement also constitutes a fixture filing as to the collateral indicated in the financing statement which is or is to become fixtures.