Section 9--512. Amendment of Financing Statement.
    (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  in  a filing office described in Section 9--501(a)(1),
             provides  the  date  and  time  that  the  initial  financing
             statement  was filed and 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.