Not the poster you're replying to, but what I read it as was: many employers posts lists like this, but they are not necessarily "clear boundaries", because often they don't mean what you think the plain-English bullet point would mean. The most common one is that "safety is our #1 priority" type rules often have a very nuanced interpretation, with an unwritten subtext of, "but don't cause trouble by pointing out safety problems".

On the other hand, if the goal is to cover your ass, then broad rules that are somewhat ignored at management's discretion may be a feature rather than a bug.