Originally Posted by
+TSRA
NA you only get cleared to a Flight Level if operating above 18,000 feet.
From there ATC will nominate the lowest useable flight level based on the local altimeter setting. FL180 for 29.92 and above, FL190 for 29.91 - 28.92, and FL200 for anything below 28.91.
The same everywhere. You missed my point - How would you get cleared to a flight level if you weren't allowed to ever mention flight level below the TA?
It was however, tongue in cheek.