Nato summit: leaders declare China presents security risk

Communique is first time alliance has asserted it needs to respond to Beijing’s growing power

这是卫报的新闻，第一段是标题，第二段是Billboard吗？还是算副标题？

第二段中是省略了Communique is (the) first time (when) (for which )alliance has asserted it needs to respond to Beijing’s growing power

这个句子是the first time做先行词+定语从句吗?