CHB vertical rebars of long and short width wall 1

[planc]

In most of our structural plans. You only see this guide for wall. That stiffener vertical and horizonal beams are put every 3 meters (9.8 feet) (in addition to the vertical rebars every 0.6 meter (1.9 feet).
Our city hall building officials waive any computations with regards to walls. All our masons build wall the same way. So the wall has the least details in our plans.

And most engineers don't compute for wall flexure and don't know how to manually compute because they just follow the guide.
My question is.

I know vertical rebar reinforcement is usually used because the shortest distance is the vertical just like one way slab support rebars. But supposed the CHB wall is only at the center or only 1 meter width (shown in blue).. instead of the whole wall with rebars and CHB in the above. Is the flexure of it the same as when the wall span more?

 

[planc]

To reframe the above. Let me ask this question instead.

For one way slab, lb/la => 2

But what if given the same support condition, lb became very short and lb/la = 1/2..

Would the portion bend differently given the same rebars or the same flexure?

reason I'm asking is to analyze a Non-bearing wall that is short but spans vertically, would it have same flexure than if the wall was long and not short (same rebars spacing at 400mm o.c. (15.7")) ?