The US changed it. AFAIK, the icao definition has not changed, though I guess it...

		jsight on Jan 12, 2023 \| parent \| context \| favorite \| on: A corrupt file led to the FAA ground stoppage – al... The US changed it. AFAIK, the icao definition has not changed, though I guess it could in the future. Given that the US often does these kinds of things first, I've often wondered if it is a US-centric way of thinking?