ERISA does not require any employer to establish a retirement plan. It only requires that those who establish plans must meet certain minimum standards.Find general information about 401(k) plans, the tax advantages of sponsoring the plan and the types of plans available. A special 25-year retirement plan providing an alternative retirement benefit for Suffolk County correction officers became effective September 1, 1988. Vesting and Participation: ERISA sets rules regarding eligibility and vesting in 401(k) plans. Form 5500 is filed with the DOL and contains information about a 401(k) plan's financial condition, plan qualifications, and operation. Legal news and analysis on class actions. Schedules prepared in accordance with the financial reporting requirements of ERISA.