The Soares book just shows the structural steel frame as it says in 250.104[C] in the NEC.
As I was saying, I don’t see the exterior metal sheathing included in this requirement, but it usually ends up bonded to the frame through the screws used to fasten it in place.
Apparently though, some states AHJ’s interpret this requirement to include the exterior sheathing as part of the structural steel the building frame, so want some other form of intentional bonding jumper attached to it. Seems redundant to me, but I guess it couldn't hurt to do it.
