不知道主语是哪个?

题目

不知道主语是哪个?
Whatever
legislation
finally

likely
to
give
a
broader
role
to
the
Federal
Trade Whatever legislation finally emerges is likely to give a broader role to the Federal Trade Commission (FTC), which will almost certainly be charged with deciding how those principles are translated into practice and with policing their implementation.我知道whatever引导让步状语,is 是谓语,但是主语应该是legislation,但是这是什么语法现象,省略吗?
从第二个whatever开始,前面重复了

答案

Whatever legislation finally emerges是主语从句作主语 ,不是 让步状语从句
Whatever legislation引导主语从句 并且在从句中 作主语
Whatever起形容词作用 修饰 legislation