John,

In your first pic you circled the only portion of the wall that does not have diagonal bracing. Diagonal bracing is not required across the entire wall to be adequate.

In the second pic you point to the diagonal bracing. Is it adequate? I don't know. It may be and then again it may not be.

In your third pic the wall gets some lateral support from the wall that it is framed into. Does that wall have diagonal bracing on the other side of the window?

Other factors that come into play are the type of sheathing and siding that are or will be installed. Solid sheathing (e.g., plywood and OSB) can be used for lateral bracing when properly nailed. These are typically installed at corners. Panelized siding (sheets) provides some lateral support to the wall whereas vinyl siding does not.

__________________
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Bruce Breedlove
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