Originally Posted by
Atlas Shrugged
This situation happens to us sometimes while departing PAE in the LFC Dreamlifter. You are underneath SEA class B.
We fly heavies all over the world, and I have never heard of anyone getting into "trouble" over this.
Many controllers will preemptively give you the "high speed approved" clearance on initial contact.
Since nobody in ATC really cares, and most are ignorant of the rule, it's likely no one will ever get in trouble over this unless they admit to it or get in enough glue that someone dumps data from the airplane.
In the U.S., controllers may approve higher speeds in Class C and D airspace. The situation cited above is not a valid clearance.