Versions of 29 CFR 21.111 - Criteria for IRB approval of research on LawServer 2024 29 CFR 21.111 – Criteria for IRB approval of research 2023 29 CFR 21.111 – Criteria for IRB approval of research 2022 29 CFR 21.111 – Criteria for IRB approval of research 2021 29 CFR 21.111 – Criteria for IRB approval of research 2020 29 CFR 21.111 – Criteria for IRB approval of research 2019 29 CFR 21.111 – Criteria for IRB approval of research