This document contains a final rule implementing the annual funding notice requirement of section 101(f) of the Employee Retirement Income Security Act of 1974, as amended (ERISA). The final rule requires the administrators of defined benefit plans (single-employer and multiemployer) to furnish an annual funding notice to participants, beneficiaries, the Pension Benefit Guaranty Corporation, and certain other persons. The rule enhances retirement security and increases pension plan transparency by ensuring that workers receive timely and accurate notification annually of the funded status of their defined benefit pension plans. This document also contains necessary conforming amendments to other regulations under ERISA, such as the summary annual report regulation.