I'm assuming the building is a Part 9 building.
In regards to 9.36, there is no impact that you need to worry about in regards to the effective thermal resistance of the walls. There are some limited situations where it would, like for manufactured homes, but otherwise the windows just need to meet the U value or ER rating and the remainder of the wall just needs to meet the R value for above grade walls. The code in general assumes a window to wall ratio of %22, but that is for an entire cardinal direction, but there is no restriction on this on most buildings.
Now, outside of the code, how will this affect the overall thermal resistance of this building face? Severely. The required effective R value of a wall is 17.5. For windows and doors it is about 3.5. A mechanical engineer once told me a rule of thumb was if the windows and doors make up %10 of the wall, they will account for %50 of the heat loss through that assembly.