2023 North Dakota Code 38-02-05 – Tunnel, opencuts, crosscuts, adits, or drilling equivalent to discovery shaft

2022 North Dakota Code 38-02-05 – Tunnel, opencuts, crosscuts, adits, or drilling equivalent to discovery shaft

2021 North Dakota Code 38-02-05 – Tunnel, opencuts, crosscuts, adits, or drilling equivalent to discovery shaft

2019 North Dakota Code 38-02-05 – Tunnel, opencuts, crosscuts, adits, or drilling equivalent to discovery shaft

2016 North Dakota Code 38-02-05 – Tunnel, opencuts, crosscuts, adits, or drilling equivalent to discovery shaft

2014 North Dakota Code 38-02-05 – Tunnel, opencuts, crosscuts, adits, or drilling equivalent to discovery shaft

2009 North Dakota Code 38-02-05 – Tunnel, opencuts, crosscuts, adits, or drilling equivalent to discovery shaft