; (2) the individual has authority to operate an unmanned aircraft under other Federal law; (3) the individual is a holder of an airmen certificate issued under section 44703; or (4) the individual is operating a model aircraft or an unmanned aircraft being developed as a model aircraft under section 44808 and has successfully completed an aeronautical knowledge and safety test in accordance with the community-based organizations safety program described in that section. (b) Exception This section shall not apply to the operation of an unmanned aircraft system that has been authorized by the Federal Aviation Administration under section 44802, 44805, 44806, or 44807. The Administrator may waive the requirements of this section for operators of aircraft weighing less than 0.55 pounds or for operators under the age of 13 operating the unmanned aircraft system under the supervision of an adult as determined by the Administrator. (c) Aeronautical knowledge and safety test Not later than 180 days after the date of enactment of the Federal Aviation Administration Reauthorization Act of 2017 , the Administrator of the Federal Aviation Administration, in consultation with manufacturers of unmanned aircraft systems, other industry stakeholders, and community-based aviation organizations, shall develop an aeronautical knowledge and safety test that can be administered electronically. (d) Requirements The Administrator shall ensure that the aeronautical knowledge and safety test is designed to adequately demonstrate an operator's— (1) understanding of aeronautical safety knowledge, as applicable