Rehabilitation Institute of Michigan sought to recover from the Michigan United Food and Commercial Workers Health and Welfare Funds the costs of providing rehabilitation services for the 17-year old son of Terence and Stephanie Williams. The Sixth Circuit held that the District Court incorrectly interpreted the portion of defendant’s Employee Retirement Income Security Act of 1974 (“ERISA”) plan that defines eligible dependents and reversed the decision of the district court and remanded for further proceedings.