The Employee Benefits Security Administration (EBSA), an agency of the U.S. Department of Labor, is responsible for administering and enforcing the Employee Retirement Income Security Act (ERISA), which covers most private-sector pension plans, including both defined-benefit plans (traditional pensions) and defined-contribution plans (such as 401(k)s). The Pension Benefit Guaranty Corp. (PBGC), also a federal agency, insures private defined-benefit plans, but not defined-contribution plans, up to certain limits.