a separate effective date with respect to each collective bargaining agreement under which contributions to the multiemployer plan are required, which shall occur on the first day of the first plan year beginning after the termination, or if earlier, the re-opening, of each such agreement, or such earlier date as the parties to the agreement and the plan sponsor of the multiemployer plan shall agree to, and (ii) not later than the first day of the fifth plan year beginning on or after the date of the adoption of the amendment, (D) specify that, as of the amendment’s effective date, no further benefits shall accrue under the defined benefit component of the multiemployer plan, and (E) specify that, as of the amendment’s effective date, the plan sponsor of the multiemployer plan shall be the plan sponsor of both the composite plan component and the defined benefit plan component of the plan. (3) Special rules If a multiemployer plan is amended pursuant to paragraph (1)— (A) the requirements of this title shall be applied to the composite plan component and the defined benefit plan component of the multiemployer plan as if each such component were maintained as a separate plan, and (B) the assets of the composite plan component and the defined benefit plan component of the plan shall be held in a single trust forming part of the plan under which the trust instrument expressly provides— (i) for separate accounts (and appropriate records) to be maintained to reflect the interest which each of the plan components has in the trust, including separate accounting for additions to the trust for the benefit of each plan component, disbursements made from each plan component’s account in the trust, investment experience of the trust allocable to that account, and administrative expenses (whether direct expenses or shared expenses allocated proportionally), and permits, but does not require, the pooling of some or all of the assets of the two plan components for investment purposes, and (ii) that the assets of each of the