; and (ii) provides, at a minimum, role 4 medical care. (C) Location Any major medical center designated as a regional hub of a region shall be geographically located so as to maximize the support provided by uniformed medical resources in the region to the combatant commands. In designating major medical centers as a regional hub, the Director shall give consideration to the collocation of such centers with major aerial debarkation points of patients in the medical evacuation system of the United States Transportation Command. (D) Major health care delivery platform A major medical center designated as a regional hub of a region shall serve as the major health care delivery platform for the provision of complex specialized medical care in the region, whether through patient referrals from other military medical treatment facilities in the region or through referrals from other regions in the case of certain specialized medical services (such as treatment for severe burns) which may only be available at a military medical treatment facility within the region. (4) Additional military medical centers Consistent with section 1073d of title 10, United States Code, each region under paragraph (1) may include one or more additional military medical centers, whether established or maintained by the Director for purposes of this section, in order to serve locations in the region, if any, as follows: (A) Locations with large beneficiary populations. (B) Locations that serve as the primary readiness platforms of the Armed Forces. (5) Patient referrals and coordination The Director shall ensure effective and efficient medical care referrals and coordination among military medical treatment facilities in each region under paragraph (1), and among local or regional high-performing health systems in the region, through local or regional partnerships with institutional or individual civilian providers. (d) Health-readiness regions OCONUS required The organizational framework required by subsection (a) shall meet the