; and (2) in subsection (c), by adding at the end the following new paragraph: (7) Cost sharing limited to net price The coverage is provided in accordance with subsection (b)(10). . (b) Conforming amendment to cost-Sharing for low-Income individuals Section 1860D–14(a)(1)(D)(iii) of the Social Security Act ( 42 U.S.C. 1395w–114(a)(1)(D)(iii) ) is amended by adding at the end the following new sentence: For plan year 2027 and subsequent plan years, the copayment amount applicable under this clause to a supply of a covered part D drug dispensed to the individual may not exceed the amount provided under section 1860D–2(b)(10). . (c) GAO report Not later than January 1, 2029, the Comptroller General of the United States shall submit to Congress a report containing— (1) an analysis of compliance with the amendments made by this section; (2) an analysis of enforcement of such amendments; (3) recommendations with respect to improving such enforcement; and (4) recommendations relating to improving public disclosure, and public awareness of, the requirements of such amendments.