5 years of the review. (E) Ombudsperson The Participant and Plan Sponsor Advocate established under section 4004 of the Employee Retirement Income Security Act of 1974 shall act as ombudsperson for participants and beneficiaries on behalf of whom annuity contracts are purchased or who are covered by a portfolio under this paragraph. (e) Loan default If a plan is unable to make any payment on a loan under this section when due, the Pension Rehabilitation Administration shall negotiate with the plan sponsor revised terms for repayment reflecting the plan's ability to make payments, which may include installment payments over a reasonable period and, if the Pension Rehabilitation Administration deems necessary to avoid any suspension of the accrued benefits of participants, forgiveness of a portion of the loan principal. (f) Authority To issue rules, etc The Director of the Pension Rehabilitation Administration established under section 2, in consultation with the Pension Benefit Guaranty Corporation and the Department of Labor, is authorized to issue rules regarding the form, content, and process of applications for loans under this section, actuarial standards and assumptions to be used in making estimates and projections for purposes of such applications, and assumptions regarding interest rates, mortality, and distributions with respect to a portfolio described in subsection (d)(3)(C). (g) Coordination with taxation of unrelated business income Subparagraph (A) of section 514(c)(6) of the Internal Revenue Code of 1986 is amended— (1) by striking or at the end of clause (i)