(a) For each of the registrant's affiliates whose securities constitute a substantial portion of the collateral for any class of securities registered or being registered, there shall be filed the financial statements that would be required if the affiliate were a registrant and required to file financial statements. However, financial statements need not be filed pursuant to this section for any person whose statements are otherwise separately included in the filing on an individual basis or on a basis consolidated with its subsidiaries.

(b) For the purposes of this section, securities of a person shall be deemed to constitute a substantial portion of collateral if the aggregate principal amount, par value, or book value of the securities as carried by the registrant, or the market value of such securities, whichever is the greatest, equals 20 percent or more of the principal amount of the secured class of securities.