is prohibited under chapter 4 of title 1, United States Code. . (c) Effective date (1) Effective date with respect to premium credits and cost sharing reductions The amendments made by subsection (a) shall apply to taxable years after the date that is one year after the date of enactment of this Act, but only with respect to plan years beginning after such date. (2) Effective date for application to multi-State plans The amendment made by subsection (b) shall apply to plan years beginning on the date that is one year after the date of enactment of this Act.