managing office. (b) Action based on recommendations Not later than 1 year after receiving recommendations under subsection (a), the Administrator shall take such action as the Administrator considers appropriate with respect to those recommendations. 5. Accountability for aircraft registration numbers The Administrator of the Federal Aviation Administration shall review the process of reserving aircraft registration numbers and enact appropriate changes to ensure the fair participation by the general public, including the implementation of readily available software to prevent any computer auto-fill systems from reserving aircraft registration numbers in bulk. 6. Mitigating the spread of aquatic species by aircraft (a) In general Any person that holds a seaplane rating from the Administrator of the Federal Aviation Administration and successfully completes a free online education course on aquatic species mitigation that is acceptable to the Secretary of the Interior may hold themselves out to the public as qualified to inspect aircraft for aquatic invasive species and to take action to mitigate the spread of aquatic invasive species. (b) No further regulatory or enforcement action Any person that is qualified under subsection (a) or whose aircraft is inspected by a person qualified under subsection (a) and subject to the mitigation described in subsection (a) shall not be subject to any further regulatory or enforcement action by any Federal, State, local, or tribal government for any action related to aquatic invasive species. (c) Courses The Secretary of the Interior, shall publish, and periodically revise, a list of acceptable courses on mitigating the spread of aquatic invasive species by aircraft. (d) Aquatic invasive species For the purposes of this section, the term aquatic invasive species means aquatic organisms that invade ecosystems beyond their natural, historic range and whose presence may harm human health, native ecosystems, or commercial, agricultural, or recreational activities dependent on