CFR › Title 29 › Part 4220 › §4220.229 CFR §4220.2Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkThe following terms are defined in § 4001.2 of this chapter: employer, ERISA, IRS, multiemployer plan, PBGC, plan, and plan sponsor.