mark,
I don't actually have an IRC. I really don't need it. But I do remember seeing it in there years ago. It has to be in there, because you could theoretically "design" a house from it, without any other publication.
The old UBC's had it too.
I remember it went something like, "shall provide at the end of each major elevation wall", etc.
Light metal bracing or 2x4 bracing
The definition of a structural engineer: overdesign by a factor of 1.999, instead of the usual 2.