2023 North Dakota Code 43-35-18.1 – Firm engaged in installation of water well pump and pitless units to employ certified installer – Exception

2022 North Dakota Code 43-35-18.1 – Firm engaged in installation of water well pump and pitless units to employ certified installer – Exception

2021 North Dakota Code 43-35-18.1 – Firm engaged in installation of water well pump and pitless units to employ certified installer – Exception

2019 North Dakota Code 43-35-18.1 – Firm engaged in installation of water well pump and pitless units to employ certified installer – Exception

2016 North Dakota Code 43-35-18.1 – Firm engaged in installation of water well pump and pitless units to employ certified installer – Exception

2014 North Dakota Code 43-35-18.1 – Firm engaged in installation of water well pump and pitless units to employ certified installer – Exception

2009 North Dakota Code 43-35-18.1 – Firm engaged in installation of water well pump and pitless units to employ certified installer – Exception