(a) The filing office shall maintain a record of the information provided in a filed financing statement for at least one year after the effectiveness of the financing statement has lapsed under Section 9515 with respect to all secured parties of record. The record shall be retrievable by using the name of the debtor and either of the following:
(1) If the record was filed or recorded in a filing office described in paragraph (1) of subdivision (a) of Section 9501, by using the file number assigned to the initial financing statement to which the record relates and the date the record was filed or recorded.
(2) If the record was filed in a filing office described in paragraph (2) of subdivision (a) of Section 9501, by using the file number assigned to the initial financing statement to which the record relates.
(b) Except to the extent that a statute governing disposition of public records provides otherwise, the filing office immediately may destroy any written record evidencing a financing statement. However, if the filing office destroys a written record, it shall maintain another record of the financing statement which complies with subdivision (a).