How do you stop the logo being used wrongly?
You stop it by showing the bad use beside the good one and replacing the file, not with a rule nobody opens. Taste is not debated: the piece already published is swapped.
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Keep the screenshot of the bad use and the correct file in the same message. The supplier prints the mark distorted and it is handed out for a week before anyone sees it. The correct file sent again and the bad piece taken down, with the date it changes.