Yep, there's an RVSM definition, but not one for non-RVSM operations (unless you count the HEIDI definition or those of other working groups).
The DIRECTOR is right, but I thought we were just talking level busts here.....
The controller will take several things into account befre deciding whether to file, including
Can I get away with not filing?
How long a break have I got?
Will my filing drop the pilots in deep doo-doo with their employer?
Did the pilots apologise and accept their error when questioned over RTF?
etc