This document contains final regulations providing guidance on certain issues under section 411(d)(6) of the Internal Revenue Code (Code), including the interaction between the anti-cutback rules of section 411(d)(6) and the nonforfeitability requirements of section 411(a). These regulations also provide a utilization test under which certain plan amendments are permitted to eliminate or reduce certain early retirement benefits, retirement-type subsidies, or optional forms of benefit. These regulations generally affect sponsors of, and participants and beneficiaries in, qualified retirement plans.