Can walk but not stand

I’m not sure about this and would welcome others’ thoughts.

Client has an undiagnosed back condition probably exacerbated by a fall last year. She can generally walk more than 200m without stopping but when she stops her back becomes extremely painful and she can’t stand still and has to sit down. So she can manage getting round a supermarket but she can’t manage waiting at the till and has to sit on a portable folding stool. 

Most of the Moving Around descriptors refer to “stand and then move” but 2F says “Cannot…stand; or move…”

Would my client be covered by this descriptor? I’m doubtful it is the intention but the wording seems to apply. If it did, how long not being able to stand for, would count as not being able to stand?

I believe that this is intended to cover those who simply are unable to stand to start the walking process.

Your client can stand and walk, so I doubt parliamentary intent is being breached here regarding the wording.

You cannot walk without standing so what’s the point in the wording of 2f?

....because you can sit and move with at least one biological foot on the ground?