To start with the number of references to “Indigenous governing body” in this bill, what is relevant in particular is that this is the operative provision when it comes to recognition. This is the one paragraph that is the most important when it comes to providing that recognition to the Métis governments that are putting forward or are part of this bill.
In terms of the number of references, that's the reason why you're not seeing it throughout. This is also partially a drafting technique. It's used where it's needed, and it's not used where it isn't. It's as simple as that.
As for the term itself, you referenced the definition of “Indigenous governing body” that comes from Bill C-92. That one, as you rightly noted, has a broad scope. It includes things like a council and a band. Here, we're not dealing with a council and we're not dealing with a band. We're dealing specifically with Métis governments.
Essentially, the content of that definition—an explanation of what an indigenous governing body is in this particular context—is spelled out in the provision itself. The important part of that is the notion that a Métis government is authorized to act on behalf of a collectivity. Essentially, it takes that broad definition that's used in very broad contexts—like Bill C-92, which is meant to apply to all manners of indigenous governments—and is applying it, simply, to the circumstances we have in the bill.