I imagine it's considered safer to list anything that is impaired at times of the year as impaired, so people err on the side of being safer. That said, clicki

I imagine it's considered safer to list anything that is impaired at times of the year as impaired, so people err on the side of being safer. That said, clicking on the specific item gives more details (sometimes with additional links), so perhaps that might explain why it's listed (or give you a clue of where to look to find out, if you're inclined)