国家工商行政管理局关于对民用航空器设计、生产、维修企业加强登记管理的通知工商企字［１９９４］第２１号各省、自治区、直辖市及计划单列市工商行政管理局：近来，有些企业，未经中国民用航空局（以下简称民航局）等有关部门许可，擅自从事民用航空器生产制造和销售活... Notice of the State Administration for Industry and Commerce on Strengthening the Registration Management of Civil Aircraft Design, Production, and Maintenance Enterprises [2006] No. 21 of the provinces, autonomous regions, municipalities directly under the Central Government and separately planned municipal administrations for industry and commerce: Recently, some enterprises have not The Chinese Civil Aviation Administration (hereinafter referred to as the Civil Aviation Administration) and other relevant departments have permission to engage in unauthorized production and sales of civil aircraft...