(1) The proper place to file in order to perfect a security interest is as follows:
(a) when the collateral is equipment used in farming operations, or farm products, or accounts or general intangibles arising from or relating to the sale of farm products by a farmer, or consumer goods, then in the office of the register of deeds or the clerk of court in the county of the debtor's residence or if the debtor is not a resident of this State then in the office of the register of deeds or the clerk of court in the county where the goods are kept, and in addition when the collateral is crops growing or to be grown in the office of the register of deeds or the clerk of court in the county where the land is located;
(b) when the collateral is timber to be cut or is minerals or the like (including oil and gas) or accounts subject to subsection (5) of Section 36-9-103, or when the financing statement is filed as a fixture filing (Section 36-9-313) and the collateral is goods which are or are to become fixtures, then in the office where a mortgage on the real estate would be filed or recorded;
(c) in all other cases, in the office of the Secretary of State.
(2) A filing which is made in good faith in an improper place or not in all of the places required by this section is nevertheless effective with regard to any collateral as to which the filing complied with the requirements of this chapter and is also effective with regard to collateral covered by the financing statement against any person who has knowledge of the contents of the financing statement.
(3) A filing which is made in the proper place in this State continues effective even though the debtor's residence or place of business or the location of the collateral or its use, whichever controlled the original filing, is thereafter changed.
(4) The rules stated in Section 36-9-103 determine whether filing is necessary in this State.
(5) Notwithstanding the preceding subsections, and subject to subsection (3) of Section 36-9-302, the proper place to file in order to perfect a security interest in collateral including fixtures of a transmitting utility is the office of the Secretary of State. This filing constitutes a fixture filing (Section 36-9-313) as to the collateral described which is or is to become fixtures.
(6) For the purposes of this section, the residence of an organization is its place of business if it has one or its chief executive office if it has more than one place of business.