550 A.2d 852 Carol Ann Pomeren, Appellant v. Commonwealth of Pennsylvania, Department of Environmental Resources, Appellee. Commonwealth Court of Pennsylvania.Argued September 13, 1988. November 23, 1988. Immunity — Appellate decisions — Recreation Use of Land and Water Act, Act of February 2, 1966, P.L. (1965) 1860 — Hiking trail. 1. Appellate decisions are retrospective unless […]