Versions of 49 CFR 391.64 - Grandfathering for certain drivers who participated in a vision waiver study program on LawServer 2024 49 CFR 391.64 – Grandfathering for certain drivers who participated in a vision waiver study program 2023 49 CFR 391.64 – Grandfathering for certain drivers who participated in a vision waiver study program 2022 49 CFR 391.64 – Grandfathering for certain drivers who participated in a vision waiver study program 2021 49 CFR 391.64 – Grandfathering for certain drivers who participated in a vision waiver study program 2020 49 CFR 391.64 – Grandfathering for certain drivers participating in vision and diabetes waiver study programs 2019 49 CFR 391.64 – Grandfathering for certain drivers participating in vision and diabetes waiver study programs 2016 49 CFR 391.64 – Grandfathering for certain drivers participating in vision and diabetes waiver study programs 2015 49 CFR 391.64 – Grandfathering for certain drivers participating in vision and diabetes waiver study programs 2010 49 CFR 391.64 – Grandfathering for certain drivers participating in vision and diabetes waiver study programs