OPTN: Organ Procurement and Transplantation Network

OPTN: Organ Procurement and Transplantation Network: "The Organ Procurement and Transplantation Network (OPTN) is the unified transplant network established by the United States Congress under the National Organ Transplant Act (NOTA) of 1984. The act called for the network to be operated by a private, non-profit organization under federal contract."

The NOTA created "a" network, but not "the only permissible" network.