Versions of Iowa Code 151.1 - \"Chiropractic\" defined on LawServer 2023 Iowa Code 151.1 – “Chiropractic” defined 2022 Iowa Code 151.1 – “Chiropractic” defined 2020 Iowa Code 151.1 – “Chiropractic” defined 2018 Iowa Code 151.1 – “Chiropractic” defined 2016 Iowa Code 151.1 – “Chiropractic” defined 2014 Iowa Code 151.1 – “Chiropractic” defined. 2009 Iowa Code 151.1 – “Chiropractic” defined