CFR›Title 10›Chapter I›Part 50›Subject Group Classification and Description of Licenses ContainsSections § 50.20–§ 50.23CorpusDaily eCFRDisplayed edition2026-09-28Last updated2026-09-28 Sections § 50.20 § 50.20 Two classes of licenses. § 50.21 § 50.21 Class 104 licenses; for medical therapy and research and development facilities. § 50.22 § 50.22 Class 103 licenses; for commercial and industrial facilities. § 50.23 § 50.23 Construction permits.