Children under the age of seven must wear a hard hat.
Even workmen wearing their high-vis jacket and hard hat were sitting at a counter sipping a skinny latte.
Fifty years before that, the hard hat didn't even exist.
He was a pioneer in building safety requiring that workers have daily sobriety tests, wear specially-designed headgear - the precursor to today's hard hat - as well as glare-free goggles and wind protection hand cream.
You may expect the history of the hard hat to extend well into the past.