The main purpose of this legislation is to give the Secretary of Health and Human Services the authority to collect registration fees from members of the Organ Procurement and Transplantation Network (OPTN). The goal is to support the operations of the OPTN, which plays a crucial role in managing organ transplants in the United States. Key provisions of the legislation include the establishment of a system for collecting registration fees from members of the OPTN for each transplant candidate they add to the waiting list.