@jnm its standard in Europe too. I'm going yo be working at a joint venture so I am not sure what rules apply. My experience thought China and Korea is that lock out is never done (except by me) and colleagues complain when I do it!
My checked baggage triggered alarms and I was summoned to have it searched, security did not like the look of my safety lock-out hasps! Once I demonstrated what they were for all was well! image [chimp.li]