; or (ii) managing the prescription drug benefits provided by the plan, which may include formulary management, the processing and payment of claims for prescription drugs, the performance of drug utilization review, the processing of drug prior authorization requests, the adjudication of appeals or grievances related to the prescription drug benefit, contracting with network pharmacies, or the provision of related services; or (B) any entity that is owned, affiliated, or related under a common ownership structure with a person, business, or entity described in paragraph (1); and (2) the term rebate means any discount the terms of which are fixed and disclosed in writing to the buyer at the time of the purchase to which the discount applies, but which is not given at the time of purchase. . (B) Clerical amendment The table of sections for subchapter B of chapter 100 of the Internal Revenue Code of 1986 is amended by adding at the end the following: Sec. 9826. Requirements with respect to prescription drug benefits. . (4) Effective date The amendments made by paragraphs (1), (2), and (3) shall take effect on January 1, 2025.