Sec. 2 Reauthorization of provision pertaining to drugs containing single enantiomers Section 505(u) of the Federal Food, Drug, and Cosmetic Act (21 U.S.C. 355(u)) is amended— ⋯ (1) in paragraph (1)(A)(ii)(II), by adding “(other than bioavailability studies)” after “any clinical investigations”; and ⋯ (2) in paragraph (4), by striking “October 1, 2022” and inserting “October 1, 2027”. ⋯