As defined in 1983 Erlenborn ERISA Amendment, an employee welfare benefit plan or any other arrangement providing any of the benefits of an employee welfare benefit plan to the employees of two or more employers. MEWAs that do not meet the ERISA definition of employee benefit plan and are not certified by the U.S. Department of Labor may be regulated by states. MEWAs that are fully insured and certified must only meet broad state insurance laws regulating reserves.