It's fairly likely that the reasoning behind the new instruction is perfectly sound, as it was intended.
However, it wouldn't be the first occasion when someone has put out a notice, but because of their, how should we put it diplomatically, less than competent use of written English, has put something out which is just plain incorrect. I've seen cases before now where one single word (even in one case a single letter!) put in - or missing from - a notice or procedure in error has changed the whole meaning of the instruction and resulted in confusion.
It seems reasonably likely as it has been described that something similar has occurred on this occasion too. If enough people drop your friendly safety or operations standards team an email they'll be able to clarify what was intended.