succeeding to all or substantially all of the corporate trust business of the Trustee, shall be the successor of the Trustee hereunder, provided such organization or entity shall be otherwise qualified and eligible under this Article 6, without the execution or filing of any paper or any further act on the part of any of the parties hereto. In case any of the Securities has been authenticated, but not delivered, by the Trustee then in office, any successor by merger, conversion or consolidation to such authenticating Trustee may adopt such authentication and deliver the Securities so authenticated with the same effect as if such successor Trustee had itself authenticated such Securities. Section 6.12 Co-Trustees. At any time or times, for the purpose of meeting the legal requirements of any jurisdiction in which any part of the Collateral may at the time be located, the Co-Issuers and the Trustee shall have power to appoint one or more Persons to act as co-trustee (subject to the written approval of the Rating Agencies), jointly with the Trustee, of all or any part of the Collateral, with the power to file such proofs of claim and take such other actions pursuant to Section 5.6 herein and to make such claims and enforce such rights of action on behalf of the Holders, as such Holders themselves may have the right to do, subject to the other provisions of this Section 6.12. The Co-Issuers shall join with the Trustee in the execution, delivery and performance of all instruments and agreements necessary or proper to appoint a co-trustee. If the Co-Issuers do not join in such appointment within 15 days after the receipt by them of a request to do so, the Trustee shall have the power to make such appointment. Should any written instrument from the Co-Issuers be required by any co-trustee so appointed, more fully confirming to such co-trustee such property, title, right or power, any and all such instruments shall, on request, be executed, acknowledg