Versions of Montana Code 15-70-440. Unlawful use of aviation fuel on LawServer 2023 Montana Code 15-70-440. Unlawful use of aviation fuel 2022 Montana Code 15-70-440. Unlawful use of aviation fuel 2021 Montana Code 15-70-440. Unlawful use of aviation fuel 2019 Montana Code 15-70-440. Unlawful use of aviation fuel 2018 Montana Code 15-70-440. Unlawful use of aviation fuel 2016 Montana Code 15-70-440. Unlawful use of aviation fuel