408 (including by reason of subsection (c) thereof), whichever is applicable, and (II) each employer in the plan takes such actions as the Secretary or such person determines are necessary for the plan to meet the requirements described in subclause (I), including providing to such person any disclosures or other information which the Secretary may require or which such person otherwise determines are necessary to administer the plan or to allow the plan to meet such requirements, (ii) registers as a pooled plan provider with the Secretary, and provides such other information to the Secretary as the Secretary may require, before beginning operations as a pooled plan provider, (iii) acknowledges in writing that such person is a named fiduciary (within the meaning of section 402(a)(2) of the Employee Retirement Income Security Act of 1974), and the plan administrator, with respect to the plan, and (iv) is responsible for ensuring that all persons who handle assets of, or who are fiduciaries of, the plan are bonded in accordance with section 412 of the Employee Retirement Income Security Act of 1974. (B) Audits, examinations and investigations The Secretary may perform audits, examinations, and investigations of pooled plan providers as may be necessary to enforce and carry out the purposes of this subsection. (C) Aggregation rules For purposes of this paragraph, in determining whether a person meets the requirements of this paragraph to be a pooled plan provider with respect to any plan, all persons who perform services for the plan and who are treated as a single employer under subsection (b), (c), (m), or (o) of section 414 shall be treated as one person. (D) Treatment of employers as plan sponsors Except with respect to the administrative duties of the pooled plan provider described in subparagraph (A)(i), each employer in a plan which has a pooled plan provider shall be treated as the plan sponsor with respect to the portion of the plan attributable to employees of such employer (or beneficiaries of such