(a) Notwithstanding the provisions of § 270.23c-1 (Rule N-23c-1), a registered closed-end investment company may call or redeem any securities of which it is the issuer, in accordance with the terms of such securities or the charter, indenture or other instrument pursuant to which such securities were issued: Provided, That, if less than all the outstanding securities of a class or series are to be called or redeemed the call or redemption shall be made by lot, on a pro rata basis, or in such other manner as will not discriminate unfairly against any holder of the securities of such class or series.

(b) A registered closed-end investment company which proposes to call or redeem any securities of which it is the issuer shall file with the Commission notice of its intention to call or redeem such securities at least 30 days prior to the date set for the call or redemption; Provided, however, That if notice of the call or the redemption is required to be published in a newspaper or otherwise, notice shall be given to the Commission at least 10 days in advance of the date of publication. Such notice shall be filed in triplicate and shall include