Commercial space transportation (CST) will occur in the foreseeable future. After the success of Virgin Galactic's first suborbital commercial human spaceflight in 2004, many believed that our generation will explore another frontier of technology. Despite technological advancements, however, the international law currently in place is not prepared to regulate and secure the safety of CST including human spaceflights. Previous legal studies mainly focused on finding ways to accommodate CST under existing international laws, air law, or space law regime. Nevertheless, more than fifty years of legal discussion have yet to yield a decisive solution. Against the odds, CST will commence its business sooner or later. While national laws would be sufficient in many CST operations, some operations (e.g., international flight) would require international rules to secure a safe CST operation akin to what the aviation community developed for international air transport. That mechanism is encompassed in the technical standards created by the International Civil Aviation Organization. In this respect, this study aims to analyze a way to generate internationally harmonized technical standards on CST activities, with or without achieving an international law for CST. First, the article analyzes past legal discussion to understand the landscape of future aerospace activities. Then, the study reviews the history of the international aviation legal regime to find the implications of creating internationally harmonized technical standards for CSTs. The study suggests to the international community first, to forge a common ground across countries and second, that qualitative (not quantitative) international technical standards should arise based on this mutual understanding.

商业太空运输（CST）将在可预见的将来发生。维珍银河公司（Virgin Galactic）在2004年成功进行了首次亚轨道商业人类太空飞行后，许多人相信我们这一代人将探索技术的另一个前沿。然而，尽管技术进步，但现行的国际法还没有准备好监管和确保包括人类航天在内的科技委的安全。以前的法律研究主要集中在根据现行国际法，航空法或太空法制度寻找适应CST的方法。然而，五十多年的法律讨论尚未产生决定性的解决方案。在这种情况下，CST迟早会开始营业。虽然国家法律在许多CST运营中就足够了，但某些运营（例如，国际航班）将需要国际规则来确保安全的CST操作，这类似于航空界为国际航空运输而开发的内容。该机制包含在国际民航组织制定的技术标准中。在这方面，本研究旨在分析一种在没有实现国际科技委法律的情况下就国际科技委活动制定国际统一技术标准的方法。首先，本文分析了过去的法律讨论，以了解未来航空航天活动的前景。然后，该研究回顾了国际航空法律制度的历史，以发现为CST创建国际统一的技术标准的意义。该研究建议国际社会首先建立国家间的共识，其次，