The Secretary shall not permit the enrollment under section
1395w–101 of this title in a prescription drug plan offered by a PDP sponsor under this part, and the sponsor shall not be eligible for payments under section
1395w–114 or
1395w–115 of this title, unless the Secretary has entered into a contract under this subsection with the sponsor with respect to the offering of such plan. Such a contract with a sponsor may cover more than one prescription drug plan. Such contract shall provide that the sponsor agrees to comply with the applicable requirements and standards of this part and the terms and conditions of payment as provided for in this part.