Ug, my bad. I thought he was at the airport.

BUT... since I dug up the FOM, Ch 1, first page
First bullet point under 'Seasonal and Geographical Uniform Requirements, it states:
When wearing the uniform coat, leather jacket, and/or overcoat, the hat must be worn.

It doesn't specify in airport or hotel. I'd assume it means all times in public.

I don't care who does/doesn't wear a hat, but since this person's Instagram is cleared through Whacker Drive, one would expect full compliance with company directives. That is not the case in this video.