In the second place, and also as a preliminary step, the importance of the 1969 Vienna Convention on the Law of Treaties should be reconsidered as an essential source of inspiration for the Commission's work on the topic.
15. 第二个初步问题是重新考虑1969年《维也纳条约法公约》在作为必要的概念来源方面,对委员会这一主题的工作究竟有多么重要。