Paul R. Peterson Construction Inc. V. Arizona State Carpenters Health And Welfare Trust Fund

This appeal involves an examination of the relationship between federal and state law regarding the viability of an equitable estoppel claim asserted against a union trust fund employee health and welfare benefits plan that is subject to the Employment Retirement Income Security Act (ERISA), under 29 U.S.C. § 1002(l). As a preliminary matter, we must determine whether law of the case established by a prior final appellate decision  in this matter applies. The issues before us include the following: