Melchett, thank you. I admit I said 'we were taught' not that that was the case when I finally retired a few years ago.
The other thing that lapsed was the formality of saluting on entering an office. Hats on was of course still the case even when I retired however for a routine visit almost everyone removes their cap on entering a building thus avoiding need to salute.
There was an OC Admin at Waddo who put out an order that people visiting SHQ were to wear headdress at all times. Well an order was an order.
Attending an Environmental meeting I sat there SD Hat on until OC SSS asked why. Take it off he said. The rule then died a death
Ad an aside, the cousins used to insist on uncovering on entering a building even to the extent of a soldier telling you to uncover.