Show must register planes A ity of will which ch may ile he mitigated by the secretary of coln coin merce ts IS imposed for engaging in ili interstate ter ier state or foreign air commerce without a certificate of registration or navigating register regi ed aircraft without withof it a of air worthiness or in n violation thereof or serving servin g its as rn an airman of registered aircraft without ft cor or in violation of the terms ol of the ahe certificate or navigating otherwise than in conformity with tile the air traffic rules or the executive orders regulating air sp space ace reservation |