Versions of North Dakota Code 4.1-31-18 - Cooperation with federal government on LawServer 2023 North Dakota Code 4.1-31-18 – Cooperation with federal government 2022 North Dakota Code 4.1-31-18 – Cooperation with federal government 2021 North Dakota Code 4.1-31-18 – Cooperation with federal government 2019 North Dakota Code 4.1-31-18 – Cooperation with federal government