Section 9-512. (a) Amendment of information in financing statement. Subject to Section 9-509, a person may add or delete collateral covered by, continue or terminate the effectiveness of, or, subject to subsection (e), otherwise amend the information provided in, a financing statement by filing an amendment that:

(1) identifies, by its file number, the initial financing statement to which the amendment relates; and

(2) if the amendment relates to an initial financing statement filed or recorded in a filing office described in Section 9-501(a)(1), provides:

(A) in the case of unregistered land governed by chapter 36, the book and page number of the initial financing statement, or if a book and page number has not yet been assigned to the initial financing statement, the instrument number of the initial financing statement and the date on which the initial financing statement was originally filed, and, in the case of registered land governed by chapter 185, the document number of the initial financing statement; and

(B) the information specified in Section 9-502(b).

(b) Period of effectiveness not affected. Except as otherwise provided in Section 9-515, the filing of an amendment does not extend the period of effectiveness of the financing statement.

(c) Effectiveness of amendment adding collateral. A financing statement that is amended by an amendment that adds collateral is effective as to the added collateral only from the date of the filing of the amendment.

(d) Effectiveness of amendment adding debtor. A financing statement that is amended by an amendment that adds a debtor is effective as to the added debtor only from the date of the filing of the amendment.

(e) Certain amendments ineffective. An amendment is ineffective to the extent it:

(1) purports to delete all debtors and fails to provide the name of a debtor to be covered by the financing statement; or

(2) purports to delete all secured parties of record and fails to provide the name of a new secured party of record.