Versions of Nebraska Statutes 81-15,259. Property of State Energy Office; transfer to Department of Environment and Energy on LawServer 2023 Nebraska Statutes 81-15,259. Property of State Energy Office; transfer to Department of Environment and Energy 2022 Nebraska Statutes 81-15,259. Property of State Energy Office; transfer to Department of Environment and Energy 2021 Nebraska Statutes 81-15,259. Property of State Energy Office; transfer to Department of Environment and Energy 2019 Nebraska Statutes 81-15,259. Property of State Energy Office; transfer to Department of Environment and Energy