I think you are being picky for the sake of it, Common sense suggests that TOC's that put in policy that a wistle during dispatch is mandatory, is to be applied, when the train is being dispatched by a Guard / Platform Staff. This will be a seperate policy to the dispatch procedure when the train is operating DOC at an unmanned station.
To me ComUtoR made this perfectly clear, and at any point, no one has inferred that DOC dispatch has to include the whistle
Wasn't it implied on post 20:
Owing to an increase in door trap incidents, Scotrail managers issued instructions for all guards to blow their whistles at all stations prior to closing the doors. So if there happened to be another door trap incident, the guard would be disciplined if it was found that they had not blown their whistle.
For guards to blow whistles at all stations prior to dispatch? That's the scenario I'm asking about. Guards blowing whistles at all times at all stations prior to dispatch. Is it actually carried out at all times of the day or night at all stations on ScotRail as this suggests?