well taken from the test manual online:

Method of inspection,
Check aditional breaking devices for:
a. presence when known to be a mandatory fitment.
b. operation, condition completeness, and security.
c. security and condition of wiring.

Reasons for failure
1. An additional braking device:
a. missing when known to be a mandatory item.
b. inoperative, damaged, component missing, or insecure.
c. wiring insecure or damaged.

seems simple enough to me that it needs to be fixed and not ignored?