is provided under such plan or coverage— (1) the provisions of such part shall apply, as applicable— (A) in the case the drug is furnished or dispensed at a pharmacy or by a mail order service, to such plan or coverage, and to the participants and beneficiaries enrolled under such plan or coverage, during such period, with respect to such selected drug, in the same manner as such provisions apply to prescription drug plans and MA–PD plans, and to participants and beneficiaries enrolled under such prescription drug plans and MA–PD plans during such period