The department may authorize reimbursement to a legally responsible relative, a guardian, or a person granted power of attorney by the eligible consumer, who provides personal care to an eligible consumer with special health care needs residing at home. Such reimbursement shall occur only when the department determines that the needs of the eligible consumer, the unavailability of appropriate providers or suitable alternative care services, and cost efficiencies make utilization of a legally responsible relative, guardian, or person granted power of attorney by the eligible consumer, for the provision of such services necessary and appropriate. Reimbursement shall be limited to care that is medically necessary due to specific health needs and shall not be made for care generally expected and provided by a legally responsible relative, guardian, or person granted power of attorney by the eligible consumer. The department shall not authorize reimbursement to a legally responsible relative, guardian, or person granted power of attorney by the eligible consumer, until a plan and rules adopted pursuant to RSA 541-A, are reviewed and approved by the oversight committee on health and human services, established in N.H. Rev. Stat. § 126-A:13.