MOT Brake test report explanation

I thought we had a special notice about this way back. I thought we were only supposed to read the maximum efforts and base our imbalance decision on those readings, and not the rate of increase? I thought we were also suppose todisregard any imbalance if the lower brake effort locked out?

Calculating brake imbalance
For the majority of vehicles, the MOT testing service will calculate brake imbalance automatically. However, when this is not the case, such as for tricycles and quadricycles or if MTS is not working, you must calculate the brake imbalance against the maximum brake efforts on each axle in the following way:

Brake imbalance equation: (higher brake effort - lower brake effort / higher brake effort) x 100 = % imbalance

Disregard any brake imbalance across an axle if the lower recorded effort is as a result of a locked wheel or if the higher brake effort from a wheel is not more than 40kg.

The check for rear axle brake imbalance does not apply to tricycles or quadricycles.

I wonder if that special notice is now obsolete? It seems after checking that they go back as far as 2019!

Imbalance on a axle is recorded on the
Maximum readings just been watching
This years video recording from ABC Awards
This year’s training material.