The employer shall appoint a trustee for the proper care and custody of all funds, securities and other properties in the trust, and for investment of plan assets (or for execution of such orders as it receives from an investment manager appointed for investment of plan assets). The duties and powers of the trustee shall be set forth in a trust agreement executed by the employer, which is incorporated herein by reference. The named fiduciary shall review at regular intervals the performance of the trustee and shall re-evaluate the appointment of such trustee. After the employer has appointed the trustee and the named fiduciary has received a written notice of acceptance of its responsibility, the fiduciary responsibility with respect to the proper care and custody of plan assets shall be considered as the responsibility of the trustee. Unless otherwise allocated to an investment manager, the fiduciary responsibility with respect to investment of plan assets shall likewise be considered as the responsibility of the trustee.