Originally Posted by YYC009

I have never seen an announcement before on this, just usually individually during boarding the agent will ask the passenger to remove their hat. But I can appreciate if the agent sees a large group or similar that is all wearing hats, an announcement is probably an effective tool to help get the hats off earlier rather than later. They shouldn't label it as a new requirement, though, as again, it has been in place for well over a decade now - I wouldn't call that 'new' myself.