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 Pension Benefit Guaranty Corporation
 AGENCY: Pension Benefit Guaranty Corporation.
 ACTION: Notice of interest rates and assumptions.
 SUMMARY: This notice informs the public of the interest rates and assumptions to be used under certain Pension Benefit Guaranty Corporation regulations. These rates and assumptions are published elsewhere (or can be derived from rates published elsewhere), but are collected and published in this notice for the convenience of the public. Interest rates are also published on the PBGC's Web site (
                        *http://www.pbgc.gov*).
 DATES: The required interest rate for determining the variable-rate premium under part 4006 applies to premium payment years beginning in September 2005. The interest assumptions for performing multiemployer plan valuations following mass withdrawal under part 4281 apply to valuation dates occurring in October 2005.
 FOR FURTHER INFORMATION CONTACT: Catherine B. Klion, Attorney, Legislative and Regulatory Department, Pension Benefit Guaranty Corporation, 1200 K Street, NW., Washington, DC 20005, 202-326-4024. (TTY/TDD users may call the Federal relay service toll-free at 1-800-877-8339 and ask to be connected to 202-326-4024.)


SUPPLEMENTARY INFORMATION:  Variable-Rate Premiums Section 4006(a)(3)(E)(iii)(II) of the Employee Retirement Income Security Act of 1974 (ERISA) and § 4006.4(b)(1) of the PBGC's regulation on Premium Rates (29 CFR part 4006) prescribe use of an assumed interest rate (the “required interest rate”) in determining a single-employer plan's variable-rate premium. Pursuant to the Pension Funding Equity Act of 2004, for premium payment years beginning in 2004 or 2005, the required interest rate is the “applicable percentage” (currently 85 percent) of the annual rate of interest determined by the Secretary of the Treasury on amounts invested conservatively in long-term investment grade corporate bonds for the month preceding the beginning of the plan year for which premiums are being paid. Thus, the required interest rate to be used in determining variable-rate premiums for premium payment years beginning in September 2005 is 4.61 percent (
                    *i.e.*, 85 percent of the 5.42 percent composite corporate bond rate for August 2005 as determined by the Treasury). The following table lists the required interest rates to be used in determining variable-rate premiums for premium payment years beginning between October 2004 and September 2005. For premium payment years beginning in:
The interest rate is:October 2004
4.79November 2004
4.73December 2004
4.75January 2005
4.73February 2005
4.66March 2005
4.56April 2005
4.78May 2005
4.72June 2005
4.60July 2005
4.47August 2005
4.56September 2005
4.61
 Multiemployer Plan Valuations Following Mass Withdrawal The PBGC's regulation on Duties of Plan Sponsor Following Mass Withdrawal (29 CFR part 4281) prescribes the use of interest assumptions under the PBGC's regulation on Allocation of Assets in Single-Employer Plans (29 CFR part 4044). The interest assumptions applicable to valuation dates in October 2005 under part 4044 are contained in an amendment to part 4044 published elsewhere in today's 
                    **Federal Register**
                    . Tables showing the assumptions applicable to prior periods are codified in appendix B to 29 CFR part 4044. Issued in Washington, DC, on this 9th day of September 2005. Vincent K. Snowbarger, Deputy Executive Director, Pension Benefit Guaranty Corporation.


[FR Doc. 05-18327 Filed 9-14-05; 8:45 am] BILLING CODE 7708-01-P