Versions of 40 CFR 51.1318 - Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS on LawServer 2024 40 CFR 51.1318 – Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS 2023 40 CFR 51.1318 – Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS 2022 40 CFR 51.1318 – Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS 2021 40 CFR 51.1318 – Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS 2020 40 CFR 51.1318 – Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS 2019 40 CFR 51.1318 – Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS
